9-1 Solving Quadratics by Factoring

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: x² + 15x + 44 = 0

• x = -8 and x = -4

• x = -7 and x = 5

• x = -11 and x = -4

• x = -11

Solve by factoring k²+7x+10 = 0

• k = -2 and k = -5

• k = 2 and k = 5

• k = -10 and k = -4

• k = -10 and k = -2

Solve by factoring 3x²+7x-6 = 0

• x = 3 and x = -3/2

• x = 2/3 and x = -7

• x = 3 and x = -2/3

• x = -3 and x = 2/3

Solve by factoring k² - 2k = 24

• k = -4 and k = 6

• k = -6 and k = -4

• k = -6 and k = 1

• k = 4 and k = -6

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

Solve for the values of x:

(x - 3)(x + 6) = 0

• x = -3 and x = -6

• x = 3 and x = -6

• x = -3 and x = -6

• x = 3 and x = 6