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Thread: Indices Help

  1. #1
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    Indices Help

    Solve the following equations.

    $\displaystyle 3^{x2-5}-9^{x-1}=0$

    i ended up with

    $\displaystyle {1/{243}}y - {1/9}y =0$

    no clue where i went wrong
    my working out is pretty screwed up or i'd post that too.

    anyway thanks in advance
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  2. #2
    MHF Contributor
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    Re :

    Quote Originally Posted by ns2583 View Post
    Solve the following equations.

    $\displaystyle 3^{x2-5}-9^{x-1}=0$
    there is a bit of confucion .. i assume the equation is
    $\displaystyle 3^{x^2-5}-9^{x-1}=0$

    $\displaystyle 3^{x^2-5}-3^{2x-2}=0$

    $\displaystyle 3^{x^2-5}=3^{2x-2}$

    $\displaystyle x^2-5=2x-2$

    solve for x then. .
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  3. #3
    Senior Member
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    i think you need to look at your origonal post as i dont think it has been written right??
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