I need help with finding a derivative. $\displaystyle x(x-8)^2$ How would this work?
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Originally Posted by alane1994 I need help with finding a derivative. $\displaystyle x(x-8)^2$ Product rule: $\displaystyle [f^{\prime}]g+f[g^{\prime}]$. $\displaystyle [1](x-8)^2+x[2(x-8)]$
All I can say now is... duh!
Or you could just multiply out the expression. $\displaystyle x(x-8)^2 = x(x^2-16x+64)$ $\displaystyle =x^3-16x^2+64x$
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