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13 January, 10:26

What is the answer to x+y=3

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Answers (2)
  1. 13 January, 11:20
    0
    (x+y) ² = (x+y) (x+y) Then you FOIL (First, outer, inner, last)

    (x+y) ² = (x+y) (x+y) = xx + xy + xy + yy [and when you combine like terms] = x² + 2xy + y²

    (x+y) 3 = (x² + 2xy + y²) (x+y) Then you FOIL (First, outer, inner, last)

    (x+y) 3 = (x² + 2xy + y²) (x+y) = x2x + 2xxy + xy2 + x2y + 2xyy + y2y [and when you combine like terms] = x3 + 3x2y + 3xy2 + y3
  2. 13 January, 12:29
    0
    x=-y+3
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