SOLUTION: Solve using the zero product property. Be sure each equation is in standard form and factor out any common factors before attempting to solve. Check all answers in the original equ

Algebra ->  Equations -> SOLUTION: Solve using the zero product property. Be sure each equation is in standard form and factor out any common factors before attempting to solve. Check all answers in the original equ      Log On


   

Question 1071920: Solve using the zero product property. Be sure each equation is in standard form and factor out any common factors before attempting to solve. Check all answers in the original equation.
–4x^4 + 4x^3 = –168x^2

A.x = 6, x = –7, x = 0

B.x = –6, x = –7, x = 0

C.x = 6, x = 7, x = 0

D.x = –6, x = 7, x = 0
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
x%5E4-x%5E3=42x%5E2-----divided both sides by -4;

x%5E4-x%5E3-42x%5E2=0

%28x%5E2%29%28x%5E2-x-42%29=0

x%5E2%2A%28x%2B6%29%28x-7%29=0
Choice D.