I'm certain I'm missing something obvious .. again.(adsbygoogle = window.adsbygoogle || []).push({});

I'm having trouble solving the following (using a pen and paper approach)

[tex] \frac{ 3^{12} - 3^{10} }{ 3^{11} + 3^{10} } [/tex]

I've tried logarithms (I've only covered those with base 10 so far, so any log_n approach is disqualified), messing around with the exponents, roots and factoring, but I cant seem to find a way to do this without actually calculating the individual values.

Enlighten me, please.

k

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# Homework Help: This should be easy

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