SOLUTION: i do not understand how to get the answer to the following: 9 - 8x = x^2 i know the answer is x=-9 and x=1 but i do not know how to get that answer thank you

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: i do not understand how to get the answer to the following: 9 - 8x = x^2 i know the answer is x=-9 and x=1 but i do not know how to get that answer thank you       Log On


   

Question 129481: i do not understand how to get the answer to the following:
9 - 8x = x^2
i know the answer is x=-9 and x=1 but i do not know how to get that answer
thank you
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Re-arrange your equation.
9-8x=x%5E2
x%5E2%2B8x-9=0
You can then factor the equation.
%28x%2B9%29%28x-1%29=0
The two solutions are
x%2B9=0
x=-9
and
x-1=0
x=1