Quiz about Alg 1: Solving Quadratic Equations Test Review

Question 1

Solve by factoring: x² = 7x + 18

Accepted Answer

9 and -2

Answer

-7 and -18

Answer

9 and 2

Answer

2 and 7

Question 2

Solve for x:

(x-5)(x+6)=0

Accepted Answer

{5,-6 }

Answer

{5,5 }

Answer

{ -5,-5 }

Answer

{ -5,-6 }

Question 3

What is the first step in solving
(x + 2)(x - 3) = 0 ?

Accepted Answer

Set each binomial factor equal to zero

Answer

Plug in zero for x

Answer

Solve for x

Answer

FOIL

Question 4

Solve by factoring:
x² - 9x = 0

Accepted Answer

0, 9

Answer

9

Answer

-9, 0

Answer

-9

Question 5

5x2=-15

Accepted Answer

no solution

Answer

3, -3

Answer

1.7, -1.7

Answer

1.5, -1.5

Question 6

2x2=98

Accepted Answer

7, -7

Answer

49, -49

Answer

9.89, -9.89

Answer

no solution

Question 7

Solve the following by ISOLATION

$$4\left(x-5\right)^2=12$$

Accepted Answer

$$x=5\pm\sqrt[]{3}$$

Answer

$$\left(4x+20\right)^2=12$$

Answer

$$x=-5\pm\sqrt[]{3}$$

Answer

$$x=5\pm\frac{1}{2}\sqrt[]{3}$$

Question 8

Solve.

(2x - 4)² = 16

Accepted Answer

x = 0, 4

Answer

x = 4

Answer

x = 10

Answer

x = -2

Question 9

Identify a, b and c in the quadratic equation: $$2x^2-3x-5=0$$

Accepted Answer

a = 2, b = -3, c = -5

Answer

a = 2 , b = 3, c = -5

Answer

a = 2, b = -3, c = 5

Answer

a = -2, b = 3, c = 5

Question 10

Solve using the Quadratic Formula:

$$2x^2+7x-15=0$$

Accepted Answer

$$x=-5,\ 1.5$$

Answer

$$x=-1.5,\ 5$$

Answer

No Solution

Answer

$$x=0.7,\ 5$$

Question 11

Solve using the Quadratic Formula:
(Hint: Set the equation = to 0)

$$x^2+4x-40=-8$$

Accepted Answer

$$x=-8,\ 4$$

Answer

$$x=-10,\ -4$$

Answer

$$x=-4,\ 10$$

Answer

$$x=-4,\ 8$$

Question 12

Solve using the Quadratic Formula:
$$5x^2+3x-1=0$$

Accepted Answer

$$x=\frac{-3\pm\sqrt{29}}{10}$$

Answer

$$x=\frac{3\pm\sqrt{29}}{5}$$

Answer

$$x=\frac{8}{5}\ or\ x=-\frac{2}{5}$$

Answer

No real solutions

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