8.5 Starter

Factor:

10x + 15

• 100x + 150

• 10(x + 5)

• 1(10x + 15)

• 5(2x + 3)

Factor:
x² - 5x

• 1(x - 5)
• x(x - 5x)
• x(x - 5)
• x²(1 - 5)

Solve for the values of x:
(x + 2)(x - 3) = 0

• { 2, 3 }
• { -2, -3 }
• { 2, 3 }
• { -2, 3 }

Solve for the values of x:

(2x - 1)(x + 4) = 0

• { 1/2, -4 }

• { 1/2, 4 }

• { 2, -4 }

• { -2, 4 }

Solve for the values of x:

(2x + 5)(5x - 2) = 0

• { -5/2, -2/5 }

• { -5/2, 2/5 }

• { 5/2, 2/5 }

• { 5/2, -2/5 }

Solve for the values of x:
(x + 2)(x - 3) = 0

• { 2, 3 }
• { -2, -3 }
• { 2, 3 }
• { -2, 3 }

Multiply
(2x-1)(x+3)

• 2x²+5x-3
• 2x-3
• 2x²+6x-3
• 2x²-5x-3

Multiply
(4x+3)(2x-1)

• 8x²-2x-3
• 8x-3
• 8x²+6x-3
• 8x²+2x-3

Multiply
(x+5)²

• x²+25
• x²-25
• x²+10x+25
• x²-10x+25

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