7-1 Solve by Factoring

Solve for a by factoring.
a² + 2a - 24 = 0

• a = -6, 4
• a = 6, -4
• a = 12, -2
• a = 8, -3

Solve.
n² - 2n = 0

• n = 2 and 0
• n = -2 and 0
• n = 2
• n = 0

Solve
16a² - 9 = 0

• a = ^-3/₄, ³/₄ 
• a = ^-4/₃, ⁴/₃ 
• a = ^-9/₁₆, ⁹/₁₆ 
• a = ^-16/₉, ¹⁶/₉ 

Solve for x by factoring.
x² -8x +12=0

• -6, -2
• -2, 6
• 2, 6
• -6, 2

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

What should you do first to solve this equation by factoring?

x² - 28 = -3

• Get factored form

• Find two numbers which add to make -28 and multiply to make -3

• Make it equal 0 by adding 3 on each side

• Type it all in a calculator.

Solve: 3x²-48=0

• x= 4, 4

• x= -4, -4

• x= -4, 4

What are the zeros of the function:

f(x) = x² + x - 42

• 7 and -6

• 1 and 42

• -7 and 6

• 8 and -3

Solve the quadratic equation.

• x = 0 and x = 4

• x = 0 and x = -4

• x = 4 and x = -4

• x = 0 and x = 1/4