SOLUTION: Solving Equation by Factoring (zero property) Solve: 25x^2-90x=-81

Algebra ->  Distributive-associative-commutative-properties -> SOLUTION: Solving Equation by Factoring (zero property) Solve: 25x^2-90x=-81      Log On


   

Question 255121: Solving Equation by Factoring
(zero property)
Solve:
25x^2-90x=-81
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
Solve:
25x^2 -90x = -81
;
add 81 to each side
25x^2 - 90x + 81 = 0
:
This looks like a perfect square (25 * 81)
(5x - 9)(5x - 9) = 0
:
5x = 9
x = 9%2F5
;
Check by FOILing the factors:
25x^2 - 45x - 45x + 81