Posted by Cindy on Tuesday, July 1, 2008 at 3:36pm.
If the equation you are trying to solve is
x^2 -5x = -10
which is the same as
x^2 -5x +10 = 0,
then
x = [5 +/- sqrt (-15)]/2
= (5/2) +/- i(sqrt15)/2
You need to be more careful placing parentheses in your answer, and separating the original equation from the answer.
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