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Math Help - Indicies

  1. #1
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    Indicies

    Hi everyone.

    I know this may seem a little basic for university study, but we are currently doing revison and i'm stuck on this question

    Simplify the expression 3^x+y-15^y/3^y-2
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  2. #2
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    Quote Originally Posted by tim_mannire View Post
    Hi everyone.

    I know this may seem a little basic for university study, but we are currently doing revison and i'm stuck on this question

    Simplify the expression 3^x+y-15^y/3^y-2
    Dear tim,

    Do you mean, \frac{3^{x}+y-15^{y}}{3^{y}-2}
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  3. #3
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    yes, but it is 3 to the power of 3^(x+y)
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  4. #4
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    About the only thing I can think of is this:

    \frac{3^{x+y} - 15^y}{3^y - 2} = \frac{3^y(3^x - 5^y)}{3^y - 2}
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