SOLUTION: Solve. x squared - 4x = 12

Algebra ->  Quadratic Equations and Parabolas -> SOLUTION: Solve. x squared - 4x = 12      Log On


   

Question 123833: Solve.
x squared - 4x = 12
Answer by solver91311(24713) About Me  (Show Source):
You can put this solution on YOUR website!
x%5E2-4x=12

x%5E2-4x-12=0

-6+%2A+2+=+-12
-6+%2B+2+=+-4

So,

%28x-6%29%28x%2B2%29=0

x=6 or x=-2

Check the answer:
6%5E2-4%286%29=36-24=12

%28-2%29%5E2-4%28-2%29=4%2B8=12

Answer checks.