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28 February, 02:50

2x2+3x+7 - (5x2-6x+9)

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  1. 28 February, 05:53
    0
    - 3x² + 9x - 2

    Step-by-step explanation:

    Given

    2x² + 3x + 7 - (5x² - 6x + 9) ← distribute the parenthesis by - 1

    = 2x² + 3x + 7 - 5x² + 6x - 9 ← collect like terms

    = - 3x² + 9x - 2
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