Solving Quadratics by Factoring & Isolating

Factor (do not solve):

49x² - 100

• (49x + 100)(x - 1)

• (7x - 10)(7x + 10)

• (49x - 10)(x + 10)

• (7x -10)(7x - 10)

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:

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:

2x² - 5x - 12 = 0

• x = -4 and x = -6

• x = 4 and x = -3/2

• x = 4 and x = 6

• x = -4 and x = 3/2

Tags

CCSS.HSA-REI.B.4B

Solve by factoring:

n² - 2n = 0

• n = 2 and 0

• n = -2 and 0

• n = 2

• n = 0

Tags

CCSS.HSA-REI.B.4B

Solve by square rooting or factoring:

x² = 16

• ± 4

• ± 8

• 4

• 8

Tags

CCSS.HSA-REI.B.4B

Solve by square rooting or factoring:

3x² = 12

• ± 4

• 2

• ± √12

• ± 2

Tags

CCSS.HSA-REI.B.4B

Solve by square rooting:

7x² + 1 = 8

• ± 1

• ± 7

• ± √7

• ± 8

Tags

CCSS.HSA-REI.B.4B

Solve by square rooting:

x² + 4 = 68

• ± 64

• ± √8

• 8

• ± 8

Tags

CCSS.HSA-REI.B.4B

Solve by square rooting:

(x + 1) ² = 25

• ± 5

• 4 or -6

• -4 or 6

• ± 4

Tags

CCSS.HSA-REI.B.4B