<< Chapter < Page Chapter >> Page >

Section exercises

Verbal

If division of a polynomial by a binomial results in a remainder of zero, what can be conclude?

The binomial is a factor of the polynomial.

Got questions? Get instant answers now!

If a polynomial of degree n is divided by a binomial of degree 1, what is the degree of the quotient?

Got questions? Get instant answers now!

Algebraic

For the following exercises, use long division to divide. Specify the quotient and the remainder.

( x 2 + 5 x 1 ) ÷ ( x 1 )

x + 6 + 5 x - 1 , quotient: x + 6 , remainder: 5

Got questions? Get instant answers now!

( 2 x 2 9 x 5 ) ÷ ( x 5 )

Got questions? Get instant answers now!

( 3 x 2 + 23 x + 14 ) ÷ ( x + 7 )

3 x + 2 , quotient:  3 x + 2 , remainder: 0

Got questions? Get instant answers now!

( 4 x 2 10 x + 6 ) ÷ ( 4 x + 2 )

Got questions? Get instant answers now!

( 6 x 2 25 x 25 ) ÷ ( 6 x + 5 )

x 5 , quotient: x 5 , remainder: 0

Got questions? Get instant answers now!

( x 2 1 ) ÷ ( x + 1 )

Got questions? Get instant answers now!

( 2 x 2 3 x + 2 ) ÷ ( x + 2 )

2 x 7 + 16 x + 2 , quotient: 2 x 7 , remainder: 16

Got questions? Get instant answers now!

( x 3 126 ) ÷ ( x 5 )

Got questions? Get instant answers now!

( 3 x 2 5 x + 4 ) ÷ ( 3 x + 1 )

x 2 + 6 3 x + 1 , quotient: x 2 , remainder: 6

Got questions? Get instant answers now!

( x 3 3 x 2 + 5 x 6 ) ÷ ( x 2 )

Got questions? Get instant answers now!

( 2 x 3 + 3 x 2 4 x + 15 ) ÷ ( x + 3 )

2 x 2 3 x + 5 , quotient: 2 x 2 3 x + 5 , remainder: 0

Got questions? Get instant answers now!

For the following exercises, use synthetic division to find the quotient.

( 3 x 3 2 x 2 + x 4 ) ÷ ( x + 3 )

Got questions? Get instant answers now!

( 2 x 3 6 x 2 7 x + 6 ) ÷ ( x 4 )

2 x 2 + 2 x + 1 + 10 x 4

Got questions? Get instant answers now!

( 6 x 3 10 x 2 7 x 15 ) ÷ ( x + 1 )

Got questions? Get instant answers now!

( 4 x 3 12 x 2 5 x 1 ) ÷ ( 2 x + 1 )

2 x 2 7 x + 1 2 2 x + 1

Got questions? Get instant answers now!

( 9 x 3 9 x 2 + 18 x + 5 ) ÷ ( 3 x 1 )

Got questions? Get instant answers now!

( 3 x 3 2 x 2 + x 4 ) ÷ ( x + 3 )

3 x 2 11 x + 34 106 x + 3

Got questions? Get instant answers now!

( 6 x 3 + x 2 4 ) ÷ ( 2 x 3 )

Got questions? Get instant answers now!

( 2 x 3 + 7 x 2 13 x 3 ) ÷ ( 2 x 3 )

x 2 + 5 x + 1

Got questions? Get instant answers now!

( 3 x 3 5 x 2 + 2 x + 3 ) ÷ ( x + 2 )

Got questions? Get instant answers now!

( 4 x 3 5 x 2 + 13 ) ÷ ( x + 4 )

4 x 2 21 x + 84 323 x + 4

Got questions? Get instant answers now!

( x 3 3 x + 2 ) ÷ ( x + 2 )

Got questions? Get instant answers now!

( x 3 21 x 2 + 147 x 343 ) ÷ ( x 7 )

x 2 14 x + 49

Got questions? Get instant answers now!

( x 3 15 x 2 + 75 x 125 ) ÷ ( x 5 )

Got questions? Get instant answers now!

( 9 x 3 x + 2 ) ÷ ( 3 x 1 )

3 x 2 + x + 2 3 x 1

Got questions? Get instant answers now!

( 6 x 3 x 2 + 5 x + 2 ) ÷ ( 3 x + 1 )

Got questions? Get instant answers now!

( x 4 + x 3 3 x 2 2 x + 1 ) ÷ ( x + 1 )

x 3 3 x + 1

Got questions? Get instant answers now!

( x 4 3 x 2 + 1 ) ÷ ( x 1 )

Got questions? Get instant answers now!

( x 4 + 2 x 3 3 x 2 + 2 x + 6 ) ÷ ( x + 3 )

x 3 x 2 + 2

Got questions? Get instant answers now!

( x 4 10 x 3 + 37 x 2 60 x + 36 ) ÷ ( x 2 )

Got questions? Get instant answers now!

( x 4 8 x 3 + 24 x 2 32 x + 16 ) ÷ ( x 2 )

x 3 6 x 2 + 12 x 8

Got questions? Get instant answers now!

( x 4 + 5 x 3 3 x 2 13 x + 10 ) ÷ ( x + 5 )

Got questions? Get instant answers now!

( x 4 12 x 3 + 54 x 2 108 x + 81 ) ÷ ( x 3 )

x 3 9 x 2 + 27 x 27

Got questions? Get instant answers now!

( 4 x 4 2 x 3 4 x + 2 ) ÷ ( 2 x 1 )

Got questions? Get instant answers now!

( 4 x 4 + 2 x 3 4 x 2 + 2 x + 2 ) ÷ ( 2 x + 1 )

2 x 3 2 x + 2

Got questions? Get instant answers now!

For the following exercises, use synthetic division to determine whether the first expression is a factor of the second. If it is, indicate the factorization.

x 2 , 4 x 3 3 x 2 8 x + 4

Got questions? Get instant answers now!

x 2 , 3 x 4 6 x 3 5 x + 10

Yes ( x 2 ) ( 3 x 3 5 )

Got questions? Get instant answers now!

x + 3 , 4 x 3 + 5 x 2 + 8

Got questions? Get instant answers now!

x 2 , 4 x 4 15 x 2 4

Yes ( x 2 ) ( 4 x 3 + 8 x 2 + x + 2 )

Got questions? Get instant answers now!

x 1 2 , 2 x 4 x 3 + 2 x 1

Got questions? Get instant answers now!

x + 1 3 , 3 x 4 + x 3 3 x + 1

No

Got questions? Get instant answers now!

Graphical

For the following exercises, use the graph of the third-degree polynomial and one factor to write the factored form of the polynomial suggested by the graph. The leading coefficient is one.

Factor is x 2 x + 3

Graph of a polynomial that has a x-intercept at -1.
Got questions? Get instant answers now!

Factor is ( x 2 + 2 x + 4 )

Graph of a polynomial that has a x-intercept at 1.

( x 1 ) ( x 2 + 2 x + 4 )

Got questions? Get instant answers now!

Factor is x 2 + 2 x + 5

Graph of a polynomial that has a x-intercept at 2.
Got questions? Get instant answers now!

Factor is x 2 + x + 1

Graph of a polynomial that has a x-intercept at 5.

( x 5 ) ( x 2 + x + 1 )

Got questions? Get instant answers now!

For the following exercises, use synthetic division to find the quotient and remainder.

4 x 3 33 x 2

Quotient: 4 x 2 + 8 x + 16 , remainder: 1

Got questions? Get instant answers now!

3 x 3 + 2 x 5 x 1

Quotient: 3 x 2 + 3 x + 5 , remainder: 0

Got questions? Get instant answers now!

4 x 3 x 2 12 x + 4

Got questions? Get instant answers now!

x 4 22 x + 2

Quotient: x 3 2 x 2 + 4 x 8 , remainder: 6

Got questions? Get instant answers now!

Technology

For the following exercises, use a calculator with CAS to answer the questions.

Consider x k 1 x 1 with k = 1 ,   2 ,   3. What do you expect the result to be if k = 4 ?

Got questions? Get instant answers now!

Consider x k + 1 x + 1 for k = 1 ,   3 ,   5. What do you expect the result to be if k = 7 ?

x 6 x 5 + x 4 x 3 + x 2 x + 1

Got questions? Get instant answers now!

Consider x 4 k 4 x k for k = 1 ,   2 ,   3. What do you expect the result to be if k = 4 ?

Got questions? Get instant answers now!

Consider x k x + 1 with k = 1 ,   2 ,   3. What do you expect the result to be if k = 4 ?

x 3 x 2 + x 1 + 1 x + 1

Got questions? Get instant answers now!

Consider x k x 1 with k = 1 ,   2 ,   3. What do you expect the result to be if k = 4 ?

Got questions? Get instant answers now!

Extensions

For the following exercises, use synthetic division to determine the quotient involving a complex number.

x + 1 x i

1 + 1 + i x i

Got questions? Get instant answers now!

x + 1 x + i

1 + 1 i x + i

Got questions? Get instant answers now!

x 3 + 1 x i

x 2 i x 1 + 1 i x i

Got questions? Get instant answers now!

Real-world applications

For the following exercises, use the given length and area of a rectangle to express the width algebraically.

Length is x + 5 , area is 2 x 2 + 9 x 5.

Got questions? Get instant answers now!

Length is 2 x   +   5 , area is 4 x 3 + 10 x 2 + 6 x + 15

2 x 2 + 3

Got questions? Get instant answers now!

Length is 3 x 4 , area is 6 x 4 8 x 3 + 9 x 2 9 x 4

Got questions? Get instant answers now!

For the following exercises, use the given volume of a box and its length and width to express the height of the box algebraically.

Volume is 12 x 3 + 20 x 2 21 x 36 , length is 2 x + 3 , width is 3 x 4.

2 x + 3

Got questions? Get instant answers now!

Volume is 18 x 3 21 x 2 40 x + 48 , length is 3 x 4 , width is 3 x 4.

Got questions? Get instant answers now!

Volume is 10 x 3 + 27 x 2 + 2 x 24 , length is 5 x 4 , width is 2 x + 3.

x + 2

Got questions? Get instant answers now!

Volume is 10 x 3 + 30 x 2 8 x 24 , length is 2 , width is x + 3.

Got questions? Get instant answers now!

For the following exercises, use the given volume and radius of a cylinder to express the height of the cylinder algebraically.

Volume is π ( 25 x 3 65 x 2 29 x 3 ) , radius is 5 x + 1.

x 3

Got questions? Get instant answers now!

Volume is π ( 4 x 3 + 12 x 2 15 x 50 ) , radius is 2 x + 5.

Got questions? Get instant answers now!

Volume is π ( 3 x 4 + 24 x 3 + 46 x 2 16 x 32 ) , radius is x + 4.

3 x 2 2

Got questions? Get instant answers now!

Questions & Answers

how to study physic and understand
Ewa Reply
what is conservative force with examples
Moses
what is work
Fredrick Reply
the transfer of energy by a force that causes an object to be displaced; the product of the component of the force in the direction of the displacement and the magnitude of the displacement
AI-Robot
why is it from light to gravity
Esther Reply
difference between model and theory
Esther
Is the ship moving at a constant velocity?
Kamogelo Reply
The full note of modern physics
aluet Reply
introduction to applications of nuclear physics
aluet Reply
the explanation is not in full details
Moses Reply
I need more explanation or all about kinematics
Moses
yes
zephaniah
I need more explanation or all about nuclear physics
aluet
Show that the equal masses particles emarge from collision at right angle by making explicit used of fact that momentum is a vector quantity
Muhammad Reply
yh
Isaac
A wave is described by the function D(x,t)=(1.6cm) sin[(1.2cm^-1(x+6.8cm/st] what are:a.Amplitude b. wavelength c. wave number d. frequency e. period f. velocity of speed.
Majok Reply
what is frontier of physics
Somto Reply
A body is projected upward at an angle 45° 18minutes with the horizontal with an initial speed of 40km per second. In hoe many seconds will the body reach the ground then how far from the point of projection will it strike. At what angle will the horizontal will strike
Gufraan Reply
Suppose hydrogen and oxygen are diffusing through air. A small amount of each is released simultaneously. How much time passes before the hydrogen is 1.00 s ahead of the oxygen? Such differences in arrival times are used as an analytical tool in gas chromatography.
Ezekiel Reply
please explain
Samuel
what's the definition of physics
Mobolaji Reply
what is physics
Nangun Reply
the science concerned with describing the interactions of energy, matter, space, and time; it is especially interested in what fundamental mechanisms underlie every phenomenon
AI-Robot
what is isotopes
Nangun Reply
nuclei having the same Z and different N s
AI-Robot
Got questions? Join the online conversation and get instant answers!
Jobilize.com Reply
Practice Key Terms 2

Get Jobilize Job Search Mobile App in your pocket Now!

Get it on Google Play Download on the App Store Now




Source:  OpenStax, Precalculus. OpenStax CNX. Jan 19, 2016 Download for free at https://legacy.cnx.org/content/col11667/1.6
Google Play and the Google Play logo are trademarks of Google Inc.

Notification Switch

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

Ask