Solving Quadratic Equations by Factoring Answers

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A rectangular patio is 9 ft by 6 ft. When the length and width are increased by the same amount, the area becomes 88 sq ft. Ginger is using the zero product property to solve the equation (6 + x)(9 + x) = 88. What does the value of x in her solutions represent?

A
one possible length and one possible width
B
two possible amounts for the widths
C
two possible amounts for the lengths
D
two possible amounts by which the dimensions were changed
2
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The solutions to a quadratic equation are x = 2 and x = 7. If k is a nonzero constant, which of the following must be equal to the quadratic equation?

A
Option
Option A
B
Option
Option B
C
Option
Option C
D
Option
Option D
3

The hypotenuse of a right triangle is 52 in. One leg of the triangle is 8 in. more than twice the length of the other. What is the perimeter of the triangle?

A
20 in.
B
26 in.
C
120 in.
D
138 in.
4

The square of 9 less than a number is 3 less than the number. What is the number?

A
–12 or 7
B
–12 or –7
C
–7 or 12
D
7 or 12
5

The profit a company makes from producing x tabletops is modeled by the equation P(x) = 480x – 2x2. For what number of tabletops does the company make a profit of $0?

A
100 tabletops
B
120 tabletops
C
240 tabletops
D
480 tabletops
6

The height h, in feet, of a projectile t seconds after launch is modeled by the equation h = 32t – 16t2. How long after launch does the projectile return to the ground?

A
2 seconds
B
4 seconds
C
14 seconds
D
16 seconds
7

Use the zero product property to find the solutions to the equation x2 – 13x + 30 = 0.

A
x = –10 or x = –3
B
x = –10 or x = 3
C
x = –3 or x = 10
D
x = 3 or x = 10
8

What are the solutions to the equation (x – 6)(x + 8) = 0?

A
x = –6 or x = 8
B
x = –6 or x = –8
C
x = 6 or x = –8
D
x = 6 or x = 8
9

The square of a number is 12 less than 7 times the number. What is the number?

A
–4 or –3
B
–4 or 3
C
–3 or 4
D
3 or 4
10

A rectangular deck is 12 ft by 14 ft. When the length and width are increased by the same amount, the area becomes 288 sq. ft. By how much were the dimensions increased?

A
2 ft
B
4 ft
C
8 ft
D
10 ft

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