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March 28, 2017

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solve the system of equations
y = x + 4
y = x^2 + 9x +16

  • math - ,

    x^2 + 9x +16 = x + 4

    x^2 + 9x -x + 16 - 4 = -(x+4)

    x^2 + 8x + 12 = 0

    (x +2)(x+6) = 0

    solve for x

    x + 2-2 = 0 -2

    x = -2

    x - 6 -6 = 0-6

    x = -6

    (-2, 2), (-6 ,-2)

  • math - ,

    Typo

    x + 6 -6 = 0-6
    x = -6

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