Solving Quadratics Quiz Review

Convert x²-9x+20 to factored form and solve.

• (x-10)(x+2); x=-2, 10
• (x+4)(x+5); x=-5, -4
• (x-4)(x-5); x=4, 5
• Not factorable

Solve
(4a + 3)(4a - 3) = 0

• a = ^-3/₄, ³/₄ 
• a = ^-4/₃, ⁴/₃ 
• a = ^-9/₁₆, ⁹/₁₆ 
• a = ^-16/₉, ¹⁶/₉ 

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

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

Solve by taking the square root:
x² = 49

• -7
• 7
• 49
• -7, 7

Solve by taking the square root:
4x² = 100

• -10, 10
• -25, 25
• -5, 5
• 5

x²+7=20

• x=13, -13

• 
• 
• x=27, -27

2x²=100

Simplify your answer.

• x = ±25

• x = ±√50

• x = ±√100

• x = ±5√2

x² = 8

• x = ±4
• x = ±2√2
• x = ±4√2
• x = ±√4

x² -4 = 77

• 9
• -9
• No Real Solutions
• 9, -9

Solve for x     x² - 4 = 76

• x = 4 , -4
• x = 4√5    ,  -4√5
• x = 80   ,  x = -80
• x = 5√4    or    -5√4