Algebra 2

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Find the exact solutions of x^2 - (y - 6)^2 = 36 and y = -x^2.

(0,0), (6,6), and (-6,6)?

  • Algebra 2 -

    Hmmm.
    y = -x^2 so

    x^2 - (-x^2-6)^2 = 36
    x^2 - x^4 - 12x^2 - 36 = 36
    x^4 + 11x^2 + 72 = 0
    I don't see any real solutions. 11^2-4*72 < 0

  • Algebra 2 -

    Thanks

  • Algebra 2 -

    And yet, I do see that your points work.
    Hmmm.

  • Algebra 2 -

    No, they don't they fit the first equation, but not the 2nd.

    Only (0,0) works in both

  • Algebra 2 -

    Nope. (0,0) does not work in the 1st.
    0 - 36 ≠ 36

    Can't believe I let you fool me! :-)

  • Algebra 2 -

    At this point, I'm fooling myself!:-)

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