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6 November, 15:19

4x^2+12x+9-2x^2-7x-15

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  1. 6 November, 18:52
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    4x^2 + 12x + 9 - 2x^2 - 7x - 15

    4x^2 - 2x^2 = 2x^2

    12x - 7x = 5x

    9 - 15 = - 6

    2x^2 + 5x - 6
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