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Beginning and Intermediate Algebra

Sherri Messersmith

Chapter 11

Quadratic Equations - all with Video Answers

Educators


Section 1

Review of Solving Equations by Factoring

00:25

Problem 1

Solve each equation.
$(t+7)(t-6)=0$

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Ashley Volpe
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00:28

Problem 2

Solve each equation.
$3 z(2 z-9)=0$

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Ashley Volpe
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01:08

Problem 3

Solve each equation.
$u^{2}+15 u+44=0$

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Ashley Volpe
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01:11

Problem 4

Solve each equation.
$n^{2}+10 n-24=0$

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01:02

Problem 5

Solve each equation.
$x^{2}=x+56$

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00:54

Problem 6

Solve each equation.
$c^{2}+3 c=54$

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00:47

Problem 7

Solve each equation.
$1-100 w^{2}=0$

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00:37

Problem 8

Solve each equation.
$9 j^{2}=49$

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01:44

Problem 9

Solve each equation.
$5 m^{2}+8=22 m$

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01:43

Problem 10

Solve each equation.
$19 a+20=-3 a^{2}$

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01:41

Problem 11

Solve each equation.
$23 d=-10-6 d^{2}$

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01:34

Problem 12

Solve each equation.
$8 h^{2}+12=35 h$

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00:38

Problem 13

Solve each equation.
$2 r=7 r^{2}$

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00:36

Problem 14

Solve each equation.
$5 n^{2}=-6 n$

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00:13

Problem 15

Identify each equation as linear or quadratic.
$9 m^{2}-2 m+1=0$

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00:10

Problem 16

Identify each equation as linear or quadratic.
$17=3 z-z^{2}$

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00:11

Problem 17

Identify each equation as linear or quadratic.
$13-4 x=19$

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00:20

Problem 18

Identify each equation as linear or quadratic.
$10-2(3 d+1)=5 d+19$

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Ashley Volpe
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00:20

Problem 18

Identify each equation as linear or quadratic.
$10-2(3 d+1)=5 d+19$

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00:20

Problem 19

Identify each equation as linear or quadratic.
$y(2 y-5)=3 y+1$

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00:16

Problem 20

Identify each equation as linear or quadratic.
$3(4 y-3)=y(y+1)$

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00:18

Problem 21

Identify each equation as linear or quadratic.
$-4(b+7)+5 b=2 b+9$

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00:16

Problem 22

Identify each equation as linear or quadratic.
$6+2 k(k-1)=5 k$

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01:11

Problem 23

In this section, there is a mix of linear and quadratic equations as well as equations of higher degree. Solve each equation.
$13 c=2 c^{2}+6$

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00:32

Problem 24

In this section, there is a mix of linear and quadratic equations as well as equations of higher degree. Solve each equation.
$12 x-1=2 x+9$

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01:16

Problem 25

In this section, there is a mix of linear and quadratic equations as well as equations of higher degree. Solve each equation.
$2 p(p+4)=p^{2}+5 p+10$

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00:56

Problem 26

In this section, there is a mix of linear and quadratic equations as well as equations of higher degree. Solve each equation.
$z^{2}-20=22-z$

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01:11

Problem 27

In this section, there is a mix of linear and quadratic equations as well as equations of higher degree. Solve each equation.
$5(3 n-2)-11 n=2 n-1$

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00:43

Problem 28

In this section, there is a mix of linear and quadratic equations as well as equations of higher degree. Solve each equation.
$5 a^{2}=45 a$

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01:50

Problem 29

In this section, there is a mix of linear and quadratic equations as well as equations of higher degree. Solve each equation.
$3 t^{3}+5 t=-8 t^{2}$

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01:02

Problem 30

In this section, there is a mix of linear and quadratic equations as well as equations of higher degree. Solve each equation.
$6(2 k-3)+10=3(2 k-5)$

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00:58

Problem 31

In this section, there is a mix of linear and quadratic equations as well as equations of higher degree. Solve each equation.
$2(r+5)=10-4 r^{2}$

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01:10

Problem 32

In this section, there is a mix of linear and quadratic equations as well as equations of higher degree. Solve each equation.
$3 d-4=d(d+8)$

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01:00

Problem 33

In this section, there is a mix of linear and quadratic equations as well as equations of higher degree. Solve each equation.
$9 y-6(y+1)=12-5 y$

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01:03

Problem 34

In this section, there is a mix of linear and quadratic equations as well as equations of higher degree. Solve each equation.
$3 m(2 m+5)-8=2 m(3 m+5)+2$

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Ashley Volpe
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00:58

Problem 35

In this section, there is a mix of linear and quadratic equations as well as equations of higher degree. Solve each equation.
$\frac{1}{16} w^{2}+\frac{1}{8} w=\frac{1}{2}$

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01:33

Problem 36

In this section, there is a mix of linear and quadratic equations as well as equations of higher degree. Solve each equation.
$6 h=4 h^{3}+5 h^{2}$

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00:53

Problem 37

In this section, there is a mix of linear and quadratic equations as well as equations of higher degree. Solve each equation.
$12 n+3=-12 n^{2}$

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00:27

Problem 38

In this section, there is a mix of linear and quadratic equations as well as equations of higher degree. Solve each equation.
$u=u^{2}$

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01:42

Problem 39

In this section, there is a mix of linear and quadratic equations as well as equations of higher degree. Solve each equation.
$3 b^{2}-b-7=4 b(2 b+3)-1$

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01:22

Problem 40

In this section, there is a mix of linear and quadratic equations as well as equations of higher degree. Solve each equation.
$\frac{1}{2} q^{2}+\frac{3}{4}=\frac{5}{4} q$

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01:32

Problem 41

In this section, there is a mix of linear and quadratic equations as well as equations of higher degree. Solve each equation.
$t^{3}+7 t^{2}-4 t-28=0$

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01:40

Problem 42

In this section, there is a mix of linear and quadratic equations as well as equations of higher degree. Solve each equation.
$5 m^{3}+2 m^{2}-5 m-2=0$

Ashley Volpe
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01:16

Problem 43

Write an equation and solve.
The length of a rectangle is 5 in. more than its width. Find the dimensions of the rectangle if its area is $14 \mathrm{in}^{2}$.

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01:05

Problem 44

Write an equation and solve.
The width of a rectangle is $3 \mathrm{~cm}$ shorter than its length. If the area is $70 \mathrm{~cm}^{2},$ what are the dimensions of the rectangle?

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01:45

Problem 45

Write an equation and solve.
The length of a rectangle is $1 \mathrm{~cm}$ less than twice its width. The area is $45 \mathrm{~cm}^{2}$. What are the dimensions of the rectangle?

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01:24

Problem 46

Write an equation and solve.
A rectangle has an area of $32 \mathrm{in}^{2}$. Its length is $4 \mathrm{in}$. less than three times its width. Find the length and width.

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03:07

Problem 47

Find the base and height of each triangle.

Erika Bustos
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03:00

Problem 48

Find the base and height of each triangle.

Erika Bustos
Erika Bustos
Numerade Educator
01:43

Problem 49

Find the base and height of each triangle.

Erika Bustos
Erika Bustos
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01:40

Problem 50

Find the base and height of each triangle.

Erika Bustos
Erika Bustos
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03:57

Problem 51

Find the lengths of the sides of the following right triangles. (Hint: Use the Pythagorean theorem.)

Erika Bustos
Erika Bustos
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03:15

Problem 52

Find the lengths of the sides of the following right triangles. (Hint: Use the Pythagorean theorem.)

Erika Bustos
Erika Bustos
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04:27

Problem 53

Find the lengths of the sides of the following right triangles. (Hint: Use the Pythagorean theorem.)

Erika Bustos
Erika Bustos
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03:17

Problem 54

Find the lengths of the sides of the following right triangles. (Hint: Use the Pythagorean theorem.)

Erika Bustos
Erika Bustos
Numerade Educator