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6 November, 03:53

Find a polynomial, which if substituted for M will make the equation an identity:

M+M=8x^2-4x-6

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  1. 6 November, 05:39
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    That would be M = 4x^2 - 2x - 3 because

    4x^2 - 2x - 3 + 4x^2 - 2x - 3 = 8x^2 - 4x - 6
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