X^{2}+x-90
can you answer this please and think you.

If this is just factoring, x^2 + x - 90 turns into this:
(x - 9)(x + 10)

If your trying to solve for x, we take the factored expression and set it equal to 0.
(x - 9)(x + 10) = 0

Set each binomial into two equations.
x - 9 = 0 and x + 10 = 0

Solve for x and we get two answers.
x = 9
x = -10

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