Post Test Homework Factoring

What does it mean to "find the zeros" of a quadratic?

• Plug in 0 and solve the expression.
• Factor then set each factor equal to zero and solve to find x-intercepts
• Set the expression equal to zero and solve 
• Factor then set each factor equal to zero and solve to find y-intercepts

What are the factors of
25x² - 81?

• (5x - 9)(5x + 9)
• (5x - 9)(5x - 9)
• (5x + 9)(5x + 9)
• Cannot be factored

x² - 16

• Prime
• ( x - 4) ( x + 4) 
• ( x - 8) ( x + 8) 
• ( x - 4) ( x - 4) 

Factor and Solve: Remember the two numbers you choose when factoring, are not your solutions to the equation!

a² + 2a − 24 = 0

• a = −6, 4

• a = 6, −4

• a = 12, −2

• a = 8, −3

Factor:
x² + 7x - 30

• (x + 10)(x - 7)
• (x - 10)(x + 3)
• (x + 10)(x + 3)
• (x + 10)(x - 3)

Factor: 
25x² - 100y²

• ( 5x - 10y) (5x + 10y) 

• ( 5x - 10y)²
• Prime
• ( 5x - 50y) (5x + 50y) 

Factor: x² + 24x + 144

• (x + 12)²
• (x + 9)²
• (x + 15)²
• (x + 13)²

Find the solution(s) of the function.

• x = -3 and x=5

• x = 3 and x=5

• x = -3 and x=-5

• x = 3 and x=5

Find the root(s) of the function.

• x = 2 and x= -3

• x = -2 and x= -3

• x = -2 and x= 3

• x = 2 and x= 3