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21 February, 16:00

Factor the quadratic by checking factor pairs.

-15x2 - 21x + 18

-15x2 - 218 + 19 = - 3

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Answers (1)
  1. 21 February, 18:15
    0
    -3 (x + 2) (5x - 3)

    Step-by-step explanation:

    -15x² - 21x + 18

    -3 (5x² + 7x - 6)

    -3[5x² + 10x - 3x - 6]

    -3[5x (x + 2) - 3 (x + 2) ]

    -3 (x + 2) (5x - 3)
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