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Math Help - Matrices Multiplication

  1. #1
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    Matrices Multiplication

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  2. #2
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    Quote Originally Posted by positiveion View Post
    Have you been taught how to do matrix multiplication? Matrix multiplication - Wikipedia, the free encyclopedia
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  3. #3
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    I've been taught but not with unknown variables.. :S

    I'm not sure how to do it, when I multiply out the first part its
    -a^2+2a-4
    .. do I just put that into the top right hand corner of the matrice?
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  4. #4
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    Quote Originally Posted by positiveion View Post
    I've been taught but not with unknown variables.. :S

    I'm not sure how to do it, when I multiply out the first part its
    -a^2+2a-4
    .. do I just put that into the top right hand corner of the matrice?
    Top left corner, actually.

    You do the multiplication in the usual way.
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  5. #5
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    Is this the correct answer, then?
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  6. #6
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    Quote Originally Posted by positiveion View Post
    Is this the correct answer, then?
    Bottom left entry ..... the 2a^2 should be -2a^2.
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  7. #7
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    Oh okay!
    Thank you!
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