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28 November, 22:42

Factorise

5x (squared) + 17x - 12

3x (squared) + 10x + 7

+1
Answers (1)
  1. 28 November, 23:11
    0
    5x² + 17x - 12

    5x² - 20x + 3x - 12

    5x (x) - 5x (4) + 3 (x) - 3 (4)

    5x (x - 4) + 3 (x - 4)

    (5x + 3) (x - 4)

    3x² + 10x + 7

    3x² + 3x + 7x + 7

    3x (x) + 3x (1) + 7 (x) + 7 (1)

    3x (x + 1) + 7 (x + 1)

    (3x + 7) (x + 1)
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