SOLUTION: factor the following equation. x^2 - x - 90 = 0.

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Question 258050: factor the following equation.
x^2 - x - 90 = 0.
Answer by drk(1908) About Me  (Show Source):
You can put this solution on YOUR website!
We want two numbers such that their sum = -1 and their product = - 90.
We can use -10, and 9 to get
(i) %28x-10%29%28x%2B9%29+=+0
solve for x to get
x = 10
or
x = -9