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Prealgebra and Introductory Algebra

Richard N. Aufmann, Joanne S. Lockwood

Chapter 10

Factoring - all with Video Answers

Educators


Section 1

Common Factors

00:26

Problem 1

Name the greatest common factor of $4,12,$ and 16.

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00:18

Problem 2

Name the greatest common factor of $x^{3}, x^{5},$ and $x^{6}$.

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00:24

Problem 3

For the expression $x(2 x-1),$ name a. the monomial factor and b. the binomial factor.

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00:06

Problem 4

Name the common binomial factor in the expression $5 b(c-6)+8(c-6).$

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00:29

Problem 5

Rewrite the expression $2 x^{3}-x^{2}+6 x-3$ by grouping the first two terms and the last two terms.

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00:37

Problem 6

Explain why the statement is true.
a. The terms of the binomial $3 x-6$ have a common factor.
b. The expression $3 x^{2}+15$ is not in factored form.
c. $5 y-7$ is a factor of $y(5 y-7)$

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01:03

Problem 7

Factor.
$$5 a+5$$

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00:06

Problem 8

Factor.
$$7 b-7$$

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00:15

Problem 9

Factor.
$$16-8 a^{2}$$

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00:08

Problem 10

Factor.
$$12+12 y^{2}$$

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00:14

Problem 11

Factor.
$$8 x+12$$

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00:25

Problem 12

Factor.
$$16 a-24$$

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00:07

Problem 13

Factor.
$$7 x^{2}-3 x$$

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00:11

Problem 14

Factor.
$$12 y^{2}-5 y$$

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00:09

Problem 15

Factor.
$$3 a^{2}+5 a^{5}$$

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00:10

Problem 16

Factor.
$$6 b^{3}-5 b^{2}$$

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00:12

Problem 17

Factor.
$$2 x^{4}-4 x$$

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00:17

Problem 18

Factor.
$$3 y^{4}-9 y$$

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00:38

Problem 19

Factor.
$$10 x^{4}-12 x^{2}$$

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00:45

Problem 20

Factor.
$$12 a^{5}-32 a^{2}$$

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00:16

Problem 21

Factor.
$$8 a^{8}-4 a^{5}$$

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00:18

Problem 22

Factor.
$$16 y^{4}-8 y^{7}$$

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00:07

Problem 23

Factor.
$$x^{2} y^{2}-x y$$

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00:08

Problem 24

Factor.
$$a^{2} b^{2}+a b$$

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00:18

Problem 25

Factor.
$$3 x^{2} y^{4}-6 x y$$

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00:25

Problem 26

Factor.
$$12 a^{2} b^{5}-9 a b$$

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00:13

Problem 27

Factor.
$$3 x^{3}+6 x^{2}+9 x$$

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00:13

Problem 28

Factor.
$$5 y^{3}-20 y^{2}+5 y$$

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00:16

Problem 29

Factor.
$$2 x^{4}-4 x^{3}+6 x^{2}$$

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00:13

Problem 30

Factor.
$$3 y^{4}-9 y^{3}-6 y^{2}$$

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00:14

Problem 31

Factor.
$$2 x^{3}+6 x^{2}-14 x$$

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00:19

Problem 32

Factor.
$$3 y^{3}-9 y^{2}+24 y$$

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00:10

Problem 33

Factor.
$$2 y^{5}-3 y^{4}+7 y^{3}$$

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00:16

Problem 34

Factor.
$$6 a^{5}-3 a^{3}-2 a^{2}$$

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00:13

Problem 35

Factor.
$$x^{3} y-3 x^{2} y^{2}+7 x y^{3}$$

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00:14

Problem 36

Factor.
$$2 a^{2} b-5 a^{2} b^{2}+7 a b^{2}$$

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00:14

Problem 37

Factor.
$$5 y^{3}+10 y^{2}-25 y$$

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00:21

Problem 38

Factor.
$$4 b^{5}+6 b^{3}-12 b$$

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00:41

Problem 39

Factor.
$$3 a^{2} b^{2}-9 a b^{2}+15 b^{2}$$

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00:09

Problem 40

Factor.
$$8 x^{2} y^{2}-4 x^{2} y+x^{2}$$

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00:29

Problem 41

What is the GCF of the terms of the polynomial $x^{a}+x^{b}+x^{c}$ given that $a, b,$ and $c$ are all positive integers, and $a>b>c ?$

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02:42

Problem 42

Use the three expressions at the right.
a. Which expressions are equivalent to $x^{2}-5 x+6 ?$
b. Which expression can be factored by grouping?
(i) $x^{2}-15 x+10 x+6$
(ii) $x^{2}-x-4 x+6$
(iii) $x^{2}-2 x-3 x+6$

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00:09

Problem 43

Factor.
$$x(b+4)+3(b+4)$$

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00:08

Problem 44

Factor.
$$y(a+z)+7(a+z)$$

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00:07

Problem 45

Factor.
$$a(y-x)-b(y-x)$$

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00:10

Problem 46

Factor.
$$3 r(a-b)+s(a-b)$$

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00:16

Problem 47

Factor.
$$x(x-2)+y(2-x)$$

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00:17

Problem 48

Factor.
$$t(m-7)+7(7-m)$$

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00:20

Problem 49

Factor.
$$8 c(2 m-3 n)+(3 n-2 m)$$

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00:14

Problem 50

Factor.
$$2 y(4 a+b)-(b+4 a)$$

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00:25

Problem 51

Factor.
$$x^{2}+2 x+2 x y+4 y$$

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00:22

Problem 52

Factor.
$$x^{2}-3 x+4 a x-12 a$$

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00:29

Problem 53

Factor.
$$p^{2}-2 p-3 r p+6 r$$

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00:29

Problem 54

Factor.
$$t^{2}+4 t-s t-4 s$$

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00:24

Problem 55

Factor.
$$a b+6 b-4 a-24$$

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00:27

Problem 56

Factor.
$$x y-5 y-2 x+10$$

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00:23

Problem 57

Factor.
$$2 z^{2}-z+2 y z-y$$

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00:27

Problem 58

Factor.
$$2 y^{2}-10 y+7 x y-35 x$$

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00:29

Problem 59

Factor.
$$2 x^{2}-5 x-6 x y+15 y$$

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00:40

Problem 60

Factor.
$$4 a^{2}+5 a b-10 b-8 a$$

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00:24

Problem 61

Factor.
$$3 y^{2}-6 y-a y+2 a$$

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00:28

Problem 62

Factor.
$$2 r a+a^{2}-2 r-a$$

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00:36

Problem 63

Factor.
$$3 x y-y^{2}-y+3 x$$

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00:26

Problem 64

Factor.
$$2 a b-3 b^{2}-3 b+2 a$$

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00:30

Problem 65

Factor.
$$3 s t+t^{2}-2 t-6 s$$

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00:39

Problem 66

Factor.
$$4 x^{2}+3 x y-12y-16x$$

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00:18

Problem 67

Fill in the blank to make a true statement.
$a-3=$_____$(3-a)$

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00:14

Problem 68

Fill in the blank to make a true statement.
$$2-(x-y)=2+(\text{____})$$

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00:18

Problem 69

Fill in the blank to make a true statement.
$$4 x+(3 a-b)=4 x-(\text{____})$$

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04:18

Problem 70

Write an expression in factored form for the shaded portion in each of the following diagrams. Use the equation for the area of a rectangle $(A=L W)$ and the equation for the area of a circle $\left(A=\pi r^{2}\right).$
(FIGURE CANT COPY)

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