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Math Help - having a slow night!

  1. #1
    ADY
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    having a slow night!

    multiplying out brackets...

    a^2 - 3a(b-a)

    any help
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  2. #2
    ADY
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    can i use the FOIL method?
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  3. #3
    MHF Contributor Amer's Avatar
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    Quote Originally Posted by ADY View Post
    multiplying out brackets...

    a^2 - 3a(b-a)

    any help

    a^2-3a(b-a)

    a^2-3a(b+(-a))

    a^2-3a(b)+(-3a)(-a)

    a^2-3ab+3a^2
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  4. #4
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    e^(i*pi)'s Avatar
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    Quote Originally Posted by ADY View Post
    multiplying out brackets...

    a^2 - 3a(b-a)

    any help
    You can distribute the 3a:

    a^2 - 3ab + 3a^2

    Don't forget to combine like terms
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