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    survivorboi's Avatar
    survivorboi Posts: 431, Reputation: 9
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    #1

    Oct 24, 2009, 10:15 AM
    an equation on the PSAT practice!
    I have trouble doing this problem:

    If x= (square root of 3-y), what is y in terms of x?

    How do I do this ?
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
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    #2

    Oct 24, 2009, 10:19 AM
    Well, do make sure you isolate y, and this is by doing the same mathematical operation on both sides of the equal sign so that the equality remains true.



    How can you remove the square root?
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
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    #3

    Oct 24, 2009, 10:22 AM
    survivorboi? Are you still here?
    survivorboi's Avatar
    survivorboi Posts: 431, Reputation: 9
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    #4

    Oct 24, 2009, 05:19 PM

    You have to square both sides of the equation to cancel the squ root. After that, I'd by x^2=3-y and I can solve that =) thanks!
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
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    #5

    Oct 24, 2009, 11:13 PM

    You're welcome! :)
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