Unit 3 Review: Solving Quadratic Equations

Solve by factoring.
x² + 15x + 26 = 0

• x = 7, 4
• x = 2, 13
• x = -2, -13
• x = -7, -4

Solve.
2(2x - 4)² = 32

• x = 4
• x = 10
• x = -2
• x = 0, 4

Tags

CCSS.HSA-REI.B.4B

Solve by factoring.
0 = 2x² - x - 28

• x = 4, -7/2
• x = 8, -7
• x = -8, 7
• x = -4, 7/2

Solve by factoring.
x² - 10x + 22 = -2

• x = 5, -1
• x = 6, 4
• x = 0, 3
• x = 3

Solve.
12x² + 50 = 2

• x = 4
• x = 2
• x = ± 2
• x = ± 2i

Simplify
8i(-5i + 7)

• -40i² + 56i
• 50i² + 56i
• 40 + 56i
• -40 + 56i

Simplify.
(9i - 6)(8i + 12)

• -144 + 60i
• 72i² + 60i - 72
• 60i
• 132i² - 72

What number completes the square of the following expression?
x² - 12x

• -36
• 36
• -6
• 6

Solve.
8x² - 4x = 18

• (-1 ± √22)/4
• (4 ± √13)/16
• (-4 ± √30)/16
• (1 ± √37)/4

Solve.
x² + 11x = -30

• x = 5, 6
• x = -5, -6
• x = 10, 3
• x = -10, -3