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3 May, 23:13

Factor (x+y) 2 + 9 (x+y) - 10

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  1. 3 May, 23:17
    0
    { (x+y) + 10}{ (x+y) - 1}

    treat (x+y) as a single variable

    (x+y) equals N

    N^2+9N-10

    (N+10) (N-1)
  2. 3 May, 23:43
    0
    (x + y) ² + 9 (x + y) - 10

    (x + y) (x + y) + 9 (x) + 9 (y) - 10

    (x² + xy + xy + y²) + 9x + 9y - 10

    (x² + 2xy + y²) + 9x + 9y - 10
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