7-4 Solve Quadratics by Factoring

x²+4x-32=0

• x= -8, x= 4

• x= 8, x= -4

• x= -8, x= -4

x²-7x=0

• x= 0, x= -7

• x= 0, x= 7

• x=7

• x=0

81x²=25

• x= 5/9, x = -5/9

• x= -5/9, x= -5/9

• x= 5/9, x= 5/9

6x²-x-2=0

• x= -2/3, x = 1/2

• x= 2/3, x = -1/2

• x= -2/3, x = -1/2

Solve for X:

(x-5)(x+6)=0

• x = 5

• x = -5, x = 6

• x = -5, x = -6

• x = 5, x = -6

What is the first step in solving the following equation

(x + 2)(x - 3) = 0 ?

• Plug in zero for x

• Solve for x

• FOIL

• Set each binomial factor equal to zero

Which equation matches these solutions? x = 5, x = -7

• (x+5)(x-7)=0

• (x-5)(x+7)=0

• (x+5)(x+7)=0

• (x-5)(x-7)=0

Factor x² + 2x – 3 = 0 AND find the solutions

• (x - 2)(x + 1) = 0; x = 2, x = -1

• (x + 1)(x - 3) = 0; x = -1, x = 3

• (x + 2)(x - 1) = 0; x = -2, x = 1

• (x - 1)(x + 3) = 0; x = 1, x = -3

Solve by factoring:

x² - 9x = 0

• x = 9

• x = 0, x = 9

• x = -9, x = 0

• x = -9

Solve for x

x² + 15x + 44 = 0

• x = -8 , x = 2

• x = -7, x = 5

• x = -11, x = -4

• x = -11