Solving Quadratics Review

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

Tags

CCSS.HSA-REI.B.4B

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

Tags

CCSS.HSA-REI.B.4B

Solve by factoring: 4x² + 11x = 3

• x = -3/4 and x = -1

• x = 4 and x = 3

• x = 1/4 and x = -3

• x = -1/4 and x = 3

Solve by factoring: 5x² + 20 = 20x

• x = 0 and x = 2

• x = 2

• x = -2 and x = 2

• x = -2

Solve by factoring: 14m² - 12m = 0

• m = 2 and m = 76

• m = 2 and m = 0

• m = 14 and m = 12

• m = 0 and m = 6/7

Solve by factoring: 16a² - 9 = 0

• a = ^-3/₄, ³/₄

• a = ^-4/₃, ⁴/₃

• a = ^-9/₁₆, ⁹/₁₆

• a = ^-16/₉, ¹⁶/₉

Solve by using the square root method: x² = 16

• ± 4

• ± 8

• 4

• 8

Solve by using the square root method:

5b² - 4 = 41

• b = 9, b = -9

• b = 3, b = -3

• b = 8, b = -8

• no solution

Solve by using the square root method: (x - 2) ² = 9

• ± 3

• 5 or -1

• -5 or 1

• ± 9

What is the formula for the discriminant?

• x = -b/2a

• b² - 4ac

• a² + b² = c²

• x = [-b±√(b²-4ac)]/2a

Tags

CCSS.HSA-REI.B.4B