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Need help with this simultaneous equation

  1. Nov 2, 2005 #1
    I've got to solver the simultaneous equations
    y = x2 - x - 6
    x - y + 2 = 0

    I've tried it four different times and failed each time. :frown:


    PS. x2 = x squared
  2. jcsd
  3. Nov 2, 2005 #2
    make y the subject of the 2nd one, equate the two, and solve it like a quadratic....?

    ie. x+2=x^2-x-6
  4. Nov 2, 2005 #3


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    Science Advisor

    From the second equation, y= x+ 2 so the first equation becomes
    x+ 2= x2- x- 6 or x2- 2x- 8= 0.
    Solve that equation. That's easy to factor. Once you have x, put it into y= x+ 2 to find the corresponding y.
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