<< Chapter < Page Chapter >> Page >
This module is from Elementary Algebra by Denny Burzynski and Wade Ellis, Jr. Operations with algebraic expressions and numerical evaluations are introduced in this chapter. Coefficients are described rather than merely defined. Special binomial products have both literal and symbolic explanations and since they occur so frequently in mathematics, we have been careful to help the student remember them. In each example problem, the student is "talked" through the symbolic form.This module provides an exercise supplement for the chapter "Algebraic Expressions and Equations".

Exercise supplement

Algebraic expressions ( [link] )

For the following problems, write the number of terms that appear, then write the terms.

4 x 2 + 7 x + 12

three:  4 x 2 , 7 x , 12

Got questions? Get instant answers now!

List, if any should appear, the common factors for the following problems.

12 x 2 y 3 + 36 y 3

12 y 3

Got questions? Get instant answers now!

6 ( a + 4 ) + 12 ( a + 4 )

Got questions? Get instant answers now!

4 ( a + 2 b ) + 6 ( a + 2 b )

2 ( a + 2 b )

Got questions? Get instant answers now!

17 x 2 y ( z + 4 ) + 51 y ( z + 4 )

Got questions? Get instant answers now!

6 a 2 b 3 c + 5 x 2 y

no common factors

Got questions? Get instant answers now!

For the following problems, answer the question of how many.

( a + b ) ' s in 12 ( a + b ) ?

12

Got questions? Get instant answers now!

a 4 ' s in 6 a 4 ?

Got questions? Get instant answers now!

c 3 ' s in 2 a 2 b c 3 ?

2 a 2 b

Got questions? Get instant answers now!

( 2 x + 3 y ) 2 ' s in 5 ( x + 2 y ) ( 2 x + 3 y ) 3 ?

Got questions? Get instant answers now!

For the following problems, a term will be given followed by a group of its factors. List the coefficient of the given group of factors.

16 a 3 b 2 c 4 , c 4

Got questions? Get instant answers now!

7 y ( y + 3 ) , 7 y

( y + 3 )

Got questions? Get instant answers now!

( 5 ) a 5 b 5 c 5 , b c

Got questions? Get instant answers now!

Equations ( [link] )

For the following problems, observe the equations and write the relationship being expressed.

a = 3 b

The value of  a  is equal to three time the value of  b .

Got questions? Get instant answers now!

f = 1 2 m 2 + 6 g

The value of  f  is equal to six times  g  more then one half time the value of  m  squared .

Got questions? Get instant answers now!

P 2 = k a 3

The value of  P  squared is equal to the value of  a  cubed times  k .

Got questions? Get instant answers now!

Use numerical evaluation to evaluate the equations for the following problems.

C = 2 π r . Find C if π is approximated by 3.14 and r = 6.

Got questions? Get instant answers now!

I = E R . Find I if E = 20 and R = 2.

10

Got questions? Get instant answers now!

I = p r t . Find I if p = 1000 , r = 0.06 , and t = 3.

Got questions? Get instant answers now!

E = m c 2 . Find E if m = 120 and c = 186 , 000.

4 .1515 × 10 12

Got questions? Get instant answers now!

z = x u s . Find z if x = 42 , u = 30 , and s = 12.

Got questions? Get instant answers now!

R = 24 C P ( n + 1 ) . Find R if C = 35 , P = 300 , and n = 19.

7 50 or 0.14

Got questions? Get instant answers now!

Classification of expressions and equations ( [link] )

For the following problems, classify each of the polynomials as a monomial, binomial, or trinomial. State the degree of each polynomial and write the numerical coefficient of each term.

4 y 3 + 3 y + 1

trinomial; cubic; 4, 3, 1

Got questions? Get instant answers now!

9 a b 2 c 2 + 10 a 3 b 2 c 5

binomial; tenth; 9, 10

Got questions? Get instant answers now!

( 2 x y 3 ) 0 , x y 3 0

Got questions? Get instant answers now!

Why is the expression 4 x 3 x 7 not a polynomial?

. . . because there is a variable in the denominator

Got questions? Get instant answers now!

Why is the expression 5 a 3 / 4 not a polynomial?

Got questions? Get instant answers now!

For the following problems, classify each of the equations by degree. If the term linear, quadratic, or cubic applies, use it.

y x z + 4 w = 21

linear

Got questions? Get instant answers now!

5 x 2 + 2 x 2 3 x + 1 = 19

Got questions? Get instant answers now!

( 6 x 3 ) 0 + 5 x 2 = 7

quadratic

Got questions? Get instant answers now!

Combining polynomials using addition and subtraction ( [link] ) - special binomial products ( [link] )

Simplify the algebraic expressions for the following problems.

4 a 2 b + 8 a 2 b a 2 b

Got questions? Get instant answers now!

21 x 2 y 3 + 3 x y + x 2 y 3 + 6

22 x 2 y 3 + 3 x y + 6

Got questions? Get instant answers now!

2 ( 3 y 2 + 4 y + 4 ) + 5 y 2 + 3 ( 10 y + 2 )

11 y 2 + 38 y + 14

Got questions? Get instant answers now!

5 [ 3 x + 7 ( 2 x 2 + 3 x + 2 ) + 5 ] 10 x 2 + 4 ( 3 x 2 + x )

Got questions? Get instant answers now!

8 { 3 [ 4 y 3 + y + 2 ] + 6 ( y 3 + 2 y 2 ) } 24 y 3 10 y 2 3

120 y 3 + 86 y 2 + 24 y + 45

Got questions? Get instant answers now!

4 a 2 b c 3 + 5 a b c 3 + 9 a b c 3 + 7 a 2 b c 2

Got questions? Get instant answers now!

x ( 2 x + 5 ) + 3 x 2 3 x + 3

5 x 2 + 2 x + 3

Got questions? Get instant answers now!

4 k ( 3 k 2 + 2 k + 6 ) + k ( 5 k 2 + k ) + 16

Got questions? Get instant answers now!

2 { 5 [ 6 ( b + 2 a + c 2 ) ] }

60 c 2 + 120 a + 60 b

Got questions? Get instant answers now!

9 x 2 y ( 3 x y + 4 x ) 7 x 3 y 2 30 x 3 y + 5 y ( x 3 y + 2 x )

Got questions? Get instant answers now!

3 m [ 5 + 2 m ( m + 6 m 2 ) ] + m ( m 2 + 4 m + 1 )

36 m 4 + 7 m 3 + 4 m 2 + 16 m

Got questions? Get instant answers now!

2 r [ 4 ( r + 5 ) 2 r 10 ] + 6 r ( r + 2 )

Got questions? Get instant answers now!

a b c ( 3 a b c + c + b ) + 6 a ( 2 b c + b c 2 )

3 a 2 b 2 c 2 + 7 a b c 2 + a b 2 c + 12 a b c

Got questions? Get instant answers now!

s 10 ( 2 s 5 + 3 s 4 + 4 s 3 + 5 s 2 + 2 s + 2 ) s 15 + 2 s 14 + 3 s ( s 12 + 4 s 11 ) s 10

Got questions? Get instant answers now!

6 a 4 ( a 2 + 5 )

6 a 6 + 30 a 4

Got questions? Get instant answers now!

2 x 2 y 4 ( 3 x 2 y + 4 x y + 3 y )

Got questions? Get instant answers now!

5 m 6 ( 2 m 7 + 3 m 4 + m 2 + m + 1 )

10 m 13 + 15 m 10 + 5 m 8 + 5 m 7 + 5 m 6

Got questions? Get instant answers now!

a 3 b 3 c 4 ( 4 a + 2 b + 3 c + a b + a c + b c 2 )

Got questions? Get instant answers now!

( x + 2 ) ( x + 3 )

x 2 + 5 x + 6

Got questions? Get instant answers now!

( a + 1 ) ( a + 3 )

a 2 + 4 a + 3

Got questions? Get instant answers now!

4 x y 10 x y

6 x y

Got questions? Get instant answers now!

5 a b 2 3 ( 2 a b 2 + 4 )

Got questions? Get instant answers now!

7 x 4 15 x 4

8 x 4

Got questions? Get instant answers now!

5 x 2 + 2 x 3 7 x 2 3 x 4 2 x 2 11

Got questions? Get instant answers now!

4 ( x 8 )

4 x 32

Got questions? Get instant answers now!

3 a ( 5 a 6 )

15 a 2 + 18 a

Got questions? Get instant answers now!

4 x 2 y 2 ( 2 x 3 y 5 ) 16 x 3 y 2 3 x 2 y 3

Got questions? Get instant answers now!

5 y ( y 2 3 y 6 ) 2 y ( 3 y 2 + 7 ) + ( 2 ) ( 5 )

11 y 3 + 15 y 2 + 16 y + 10

Got questions? Get instant answers now!

[ ( { [ ( 5 ) ] } ) ]

5

Got questions? Get instant answers now!

x 2 + 3 x 4 4 x 2 5 x 9 + 2 x 2 6

Got questions? Get instant answers now!

4 a 2 b 3 b 2 5 b 2 8 q 2 b 10 a 2 b b 2

6 a 2 b 8 q 2 b 9 b 2

Got questions? Get instant answers now!

2 x 2 x ( 3 x 2 4 x 5 )

Got questions? Get instant answers now!

3 ( a 1 ) 4 ( a + 6 )

a 27

Got questions? Get instant answers now!

6 ( a + 2 ) 7 ( a 4 ) + 6 ( a 1 )

Got questions? Get instant answers now!

Add 3 x + 4 to 5 x 8 .

2 x 4

Got questions? Get instant answers now!

Add 4 ( x 2 2 x 3 ) to 6 ( x 2 5 ) .

Got questions? Get instant answers now!

Subtract 3 times ( 2 x 1 ) from 8 times ( x 4 ) .

2 x 29

Got questions? Get instant answers now!

( x 3 ) ( x 8 )

x 2 11 x + 24

Got questions? Get instant answers now!

( 2 a 5 ) ( 5 a 1 )

Got questions? Get instant answers now!

( 8 b + 2 c ) ( 2 b c )

16 b 2 4 b c 2 c 2

Got questions? Get instant answers now!

( 3 a ) 2

a 2 6 a + 9

Got questions? Get instant answers now!

( 6 x 4 ) 2

36 x 2 48 x + 16

Got questions? Get instant answers now!

( x y ) 2

x 2 + 2 x y + y 2

Got questions? Get instant answers now!

( m + 1 ) ( m 1 )

m 2 1

Got questions? Get instant answers now!

( 3 c + 10 ) ( 3 c 10 )

9 c 2 100

Got questions? Get instant answers now!

( 4 a + 3 b ) ( 4 a 3 b )

Got questions? Get instant answers now!

( 5 + 2 b ) ( 5 2 b )

25 4 b 2

Got questions? Get instant answers now!

( y + 3 a ) ( 2 y + a )

2 y 2 + 7 a y + 3 a 2

Got questions? Get instant answers now!

( x 2 + 2 ) ( x 2 3 )

x 4 x 2 6

Got questions? Get instant answers now!

8 ( 2 y 4 ) ( 3 y + 8 )

48 y 2 + 32 y 256

Got questions? Get instant answers now!

m 2 n ( m + n ) ( m + 2 n )

m 4 n + 3 m 3 n 2 + 2 m 2 n 3

Got questions? Get instant answers now!

( b + 2 ) ( b 2 2 b + 3 )

Got questions? Get instant answers now!

3 p ( p 2 + 5 p + 4 ) ( p 2 + 2 p + 7 )

3 p 5 + 21 p 4 + 63 p 3 + 129 p 2 + 84 p

Got questions? Get instant answers now!

( x 2 ) 2

x 2 4 x + 4

Got questions? Get instant answers now!

( x 2 + y ) 2

x 4 + 2 x 2 y + y 2

Got questions? Get instant answers now!

( 3 x 2 y 3 4 x 4 y ) 2

9 x 4 y 6 24 x 6 y 4 + 16 x 8 y 2

Got questions? Get instant answers now!

Terminology associated with equations ( [link] )

Find the domain of the equations for the following problems.

y = 8 x + 7

all real numbers

Got questions? Get instant answers now!

y = 4 x 2

all real numbers except 2

Got questions? Get instant answers now!

z = 4 x + 5 y + 10

x  can equal any real number;  y  can equal any number except 10

Got questions? Get instant answers now!

Questions & Answers

A golfer on a fairway is 70 m away from the green, which sits below the level of the fairway by 20 m. If the golfer hits the ball at an angle of 40° with an initial speed of 20 m/s, how close to the green does she come?
Aislinn Reply
cm
tijani
what is titration
John Reply
what is physics
Siyaka Reply
A mouse of mass 200 g falls 100 m down a vertical mine shaft and lands at the bottom with a speed of 8.0 m/s. During its fall, how much work is done on the mouse by air resistance
Jude Reply
Can you compute that for me. Ty
Jude
what is the dimension formula of energy?
David Reply
what is viscosity?
David
what is inorganic
emma Reply
what is chemistry
Youesf Reply
what is inorganic
emma
Chemistry is a branch of science that deals with the study of matter,it composition,it structure and the changes it undergoes
Adjei
please, I'm a physics student and I need help in physics
Adjanou
chemistry could also be understood like the sexual attraction/repulsion of the male and female elements. the reaction varies depending on the energy differences of each given gender. + masculine -female.
Pedro
A ball is thrown straight up.it passes a 2.0m high window 7.50 m off the ground on it path up and takes 1.30 s to go past the window.what was the ball initial velocity
Krampah Reply
2. A sled plus passenger with total mass 50 kg is pulled 20 m across the snow (0.20) at constant velocity by a force directed 25° above the horizontal. Calculate (a) the work of the applied force, (b) the work of friction, and (c) the total work.
Sahid Reply
you have been hired as an espert witness in a court case involving an automobile accident. the accident involved car A of mass 1500kg which crashed into stationary car B of mass 1100kg. the driver of car A applied his brakes 15 m before he skidded and crashed into car B. after the collision, car A s
Samuel Reply
can someone explain to me, an ignorant high school student, why the trend of the graph doesn't follow the fact that the higher frequency a sound wave is, the more power it is, hence, making me think the phons output would follow this general trend?
Joseph Reply
Nevermind i just realied that the graph is the phons output for a person with normal hearing and not just the phons output of the sound waves power, I should read the entire thing next time
Joseph
Follow up question, does anyone know where I can find a graph that accuretly depicts the actual relative "power" output of sound over its frequency instead of just humans hearing
Joseph
"Generation of electrical energy from sound energy | IEEE Conference Publication | IEEE Xplore" ***ieeexplore.ieee.org/document/7150687?reload=true
Ryan
what's motion
Maurice Reply
what are the types of wave
Maurice
answer
Magreth
progressive wave
Magreth
hello friend how are you
Muhammad Reply
fine, how about you?
Mohammed
hi
Mujahid
A string is 3.00 m long with a mass of 5.00 g. The string is held taut with a tension of 500.00 N applied to the string. A pulse is sent down the string. How long does it take the pulse to travel the 3.00 m of the string?
yasuo Reply
Who can show me the full solution in this problem?
Reofrir Reply
Got questions? Join the online conversation and get instant answers!
Jobilize.com Reply

Get Jobilize Job Search Mobile App in your pocket Now!

Get it on Google Play Download on the App Store Now




Source:  OpenStax, Elementary algebra. OpenStax CNX. May 08, 2009 Download for free at http://cnx.org/content/col10614/1.3
Google Play and the Google Play logo are trademarks of Google Inc.

Notification Switch

Would you like to follow the 'Elementary algebra' conversation and receive update notifications?

Ask