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Math Help - Simple Algebra Problem Multiplying

  1. #1
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    Simple Algebra Problem Multiplying

    I seem to have forgotten how to do algebra. I have tried for a while but I'm not sure how to do this.

    Simple equation where you have to multiply out the following expression

    3k (2m + 3n 5k)

    I have the solution I just need to know how to get it.
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  2. #2
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    Basically, the negative sign outside the brackets implies that it affects each term in the brackets.

    3k – (2m + 3n – 5k)
    becomes
    3k - 2m - 3n - (-5k)
    3k - 2m - 3n + 5k
    3k + 5K - 3n -2m
    8k -3n - 2m

    Its as though you had just the expression
    -(2m + 3n – 5k), the negative representing a -1. You would simply expand out the brackets, yes? to make it -2m-3n+5k. Does this make sense?
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  3. #3
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    Quote Originally Posted by sberxa View Post
    Basically, the negative sign outside the brackets implies that it affects each term in the brackets.


    Its as though you had just the expression
    -(2m + 3n 5k), the negative representing a -1. You would simply expand out the brackets, yes? to make it -2m-3n+5k. Does this make sense?
    Yes, makes perfect sense.
    Thanks.
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