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Math Help - here is another problem that i stuck on

  1. #1
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    Question here is another problem that i stuck on

    a^2 (b-c) -16b^2 (b-c)

    i tried to combine like this

    a^2b - a^2c - 16b^3 - 16b^2 c

    i don't think this is right.
    Last edited by CaptainBlack; June 28th 2007 at 02:26 PM.
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  2. #2
    Grand Panjandrum
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    Quote Originally Posted by beautiful View Post
    a^2 (b-c) -16b^2 (b-c)

    i tried to combine like this

    a^2b - a^2c - 16b^3 - 16b^2 c

    i don't think this is right.


    I don't know what you are trying to do but multiplying out gives:

    a^2b - a^2c - 16b^3 + 16b^2 c

    RonL
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  3. #3
    MHF Contributor red_dog's Avatar
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    If you want to factorize the expression, then here it is:
    a^2(b-c)-16b^2(b-c)=(b-c)(a^2-16b^2)=(b-c)(a-4b)(a+4b)
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