Math

Simplify 3x^2+6-2x+5x-4x^2+9

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  1. 3 x² + 6 - 2 x + 5 x - 4 x² + 9 =

    3 x² - 4 x² - 2 x + 5 x + 6 + 9 =

    - x² + 3 x + 15 = - ( x² - 3 x - 15 )

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