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Math Help - Finding the derivative...

  1. #1
    Junior Member alane1994's Avatar
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    Finding the derivative...

    I need help with finding a derivative.

    x(x-8)^2

    How would this work?
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  2. #2
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    Re: Finding the derivative...

    Quote Originally Posted by alane1994 View Post
    I need help with finding a derivative.

    x(x-8)^2
    Product rule: [f^{\prime}]g+f[g^{\prime}].

    [1](x-8)^2+x[2(x-8)]
    Thanks from alane1994 and HallsofIvy
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  3. #3
    Junior Member alane1994's Avatar
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    Re: Finding the derivative...

    All I can say now is... duh!
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  4. #4
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    Re: Finding the derivative...

    Or you could just multiply out the expression.

    x(x-8)^2 = x(x^2-16x+64)
    =x^3-16x^2+64x
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