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21 June, 14:54

9 + 21 factor the expression using gcf

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Answers (2)
  1. 21 June, 15:04
    0
    Factors of 9:

    1, 9, 3

    factors of 21:

    1, 21, 3, 7

    3 is greatest Common factor.

    Divide both numbers by three and put three outside the bracket

    3 (3+7)
  2. 21 June, 15:09
    0
    Both number are divisible by 3, so divide each by 3

    3 (3+7)
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