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March 29, 2017

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X^2 + Y^2 =70
Y = 2X + 5

MY ANSWER: -5.6, 1.6 is this correct?

  • system of equations - ,

    x^2 + (2x+5)^2 = 70
    5x^2 + 20x - 45 = 0
    x^2 + 4x - 9 = 0
    x = (-4 ± √52)/2
    = -2 ± √13
    = -5.6, 1.6

    we have a winner!

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