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Today, 01:21

Find a polynomial, which if substituted for M will make the equation an identity: M + (5x2 - 2xy) = 6x2 + 9xy-y2

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Answers (2)
  1. Today, 01:38
    0
    M=x^2+11xy-y^2

    Step-by-step explanation:

    To find M you have to subtract.

    6x^2+8xy-y^2 - (5x^2-2xy)

    6x^2+9xy-y^2-5x^2+2xy

    6x^2+11xy-y^2-5x^2

    x^2+11xy-y^2
  2. Today, 01:39
    0
    Answer: you just solve for M

    M = x^2 + 11xy - y^2

    Step-by-step explanation:

    M + (5x^2 - 2xy) = 6x^2 + 9xy-y^2

    M = 6x^2-5x^2 + 9xy+2xy - y^2

    M = x^2 + 11xy - y^2

    Check:

    x^2 + 11xy - y^2 + 5x^2 - 2xy

    6x^2 + 9xy - y^2
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