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Math Help - Radical equation solve

  1. #1
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    Radical equation solve

    The question is this and i get the answer x = 125 which when i plug it back in I think it works.

    1+ root 5 radical x = 9 -7 root 5 radical x

    the book says the answer is 125/4 i dont agree can anyone confirm
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  2. #2
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    Re: Radical equation solve

    actually wrong problem
    real problem

    3 root 3 radical x = 5 +2 root 3 radical x
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  3. #3
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    Re: Radical equation solve

    Quote Originally Posted by Capnzims View Post
    The question is this and i get the answer x = 125 which when i plug it back in I think it works.
    1+ root 5 radical x = 9 -7 root 5 radical x
    the book says the answer is 125/4 i dont agree can anyone confirm
    Is this the question: 1+\sqrt{5}\sqrt{x}=9-7\sqrt{5}\sqrt{x}~?
    If not, try to make it clearer.
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  4. #4
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    Re: Radical equation solve

    Sure my apology

    its the 3 the cube of x = 5 + 2 the cube of x
    Like the 3 is beside the radical with a little 3 outside of the radical and x is inside the radical
    and the 2 is beside the radical with a ilttle 3 outside of the radical and x is inside the radical
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  5. #5
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    Re: Radical equation solve

    Quote Originally Posted by Capnzims View Post
    Sure my apology

    its the 3 the cube of x = 5 + 2 the cube of x
    Like the 3 is beside the radical with a little 3 outside of the radical and x is inside the radical
    and the 2 is beside the radical with a ilttle 3 outside of the radical and x is inside the radical
     \begin{align*}\sqrt[3]{x}&=5+2\sqrt[3]{x}\\\sqrt[3]{x}&=-5\\x&=-125\end{align*}
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  6. #6
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    Re: Radical equation solve

    Thats the equation but there is a 3 beside the first radical so 3 little 3 radical x
    I got the answer 125. Am i right?
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  7. #7
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    Re: Radical equation solve

    Quote Originally Posted by Capnzims View Post
    Thats the equation but there is a 3 beside the first radical so 3 little 3 radical x
    I got the answer 125. Am i right?
    Yes in that case you are correct.

    But you ought to learn LaTeX posting.
    Why make us guess at what mean?
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