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31 January, 16:35

Factor the algebraic expression 27a+21

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  1. 31 January, 16:51
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    We know that we can do

    ab+ac=a (b+c)

    so find common factor

    factor them

    27a=a times 3 times 3 times 3

    21=3 times 7

    common factor=3

    3=a

    27a/3=9a

    21/3=7

    so now we have

    (3) 9a + (3) 7=3 (9a+7)
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