Unit 10 Quiz 1 Review

Solve by factoring: x² - 9x + 20 = 0

• x = -4 and x = -5

• x = 20 and x = -9

• x = 4 and x = 5

• x = -4 and x = 5

Solve by factoring: x² + 3x - 18 = 0

• x = -3 and x = 6

• x = 3 and x = -6

• x = -9 and x = 2

• x = 9 and x = -2

Solve

a² + 2a - 24 = 0

• a = -6, 4

• a = 6, -4

• a = 12, -2

• a = 8, -3

Solve for n by factoring.

• -4, 2

• -2, 4

• -16

• -4

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

• Plug in zero for x
• Solve for x
• FOIL
• Set each binomial factor equal to zero

n² + 6n - 27 = 0

• {-3, 10}

• {5, 14}

• {-12, 4}

• {-9, 3}

Solve by taking the square root:

x² = 49

• -7

• 7

• 49

• ±7

x² -4 = 77

• 9

• -9

• No Real Solutions

• ±9

Solve by taking the square root:

4x² = 100

• ±10

• ±25

• ±5

• 5

Solve by taking square roots:
5b² - 4 = 41

• b = 9, b = -9
• b = 3, b = -3
• b = 8, b = -8
• no solutionb