$f’(x) = 4x^3-2x $
Work Step by Step
$f(x) = (x^2+x)(x^2-x) $ $f’(x) = (2x+1)(x^2-x)+(2x-1)(x^2+x) $ $f’(x) = 2x^3-2x^2+x^2-x+2x^3+2x^2-x^2-x $ $f’(x) = 4x^3 -2x$
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