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Math Help - nonlinear system of equations

  1. #1
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    nonlinear system of equations

    don't know how to proceed with the following problems. this whole section is giving me fits. Thanks in advance!

    1st system
    x^2 - y^2 =5
    x^2 + 4y^2 = 25

    2nd system
    x^2 - y^2 = 20
    x^2 - 9y = 0

    3rd system
    x^2 + y^2 = 10
    x^2 + y^2 - 4y + 2 = 0
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  2. #2
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    Quote Originally Posted by Hapa View Post
    don't know how to proceed with the following problems. this whole section is giving me fits. Thanks in advance!

    1st system
    x^2 - y^2 =5 .... (1)
    x^2 + 4y^2 = 25 .... (2)

    [snip]
    From (1): x^2 = 5 + y^2. Substitute into (2) and solve for y^2 and hence y. Use your values of y to solve for x.
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