Posted by Ulises on Tuesday, February 5, 2013 at 7:38pm.
factor by grouping
x^2(x-5) + 4(x-5) > 0
(x-5)(x^2+ 4) > 0
x^2 + 4 is always positive, so for the whole thing to be positive
x-5 > 0
x > 5
express it in the form you were taught.
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