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3 June, 16:15

Factor completely 9x^21+9x-4

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  1. 3 June, 16:17
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    Hi,

    9x² + 9x - - 4 = 9x² + 12x - - 3x - - 4 = 9x² - - 3x + 12x - - 4 =

    = 3x (3x - - 1) + 4 (3x - - 1) = (3x - - 1) (3x + 4).

    Green eyes.
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