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3(x+y)-9(x+y)(x+y)

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3(x+y)-9(x+y)(x+y)

    • Posted by Govind Bansal 7 years, 1 month ago

    CBSE > Class 08 > Mathematics
    • 1 answers

    Yogita Ingle 7 years, 1 month ago

    3(x + y) - 9(x + y)(x + y)
    = 3x + 3y - 9 [x2 + xy + xy + y2]
    = 3x + 3y - 9[x2 + 2xy + y2]
    = 3x + 3y - 9x2 - 18xy - 9y2

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