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10 October, 07:40

Factorise x2-22-+117

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Answers (1)
  1. 10 October, 09:29
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    (x - 9) (x - 13)

    Step-by-step explanation:

    Find the factors of 117

    1,117

    3,39

    9,13

    Because 117 is positive, the factors are either both positive or both negative.

    Find the pair which sums to - 22. Inorder to get to - 22, the factors must be negative.

    -1 + - 117 = - 118

    -3 + - 39 = - 42

    -9 + - 13 = - 22

    The correct factor is - 9,-13. Put it inside the brackets.

    (x - 9) (x - 13)
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