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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Originally Posted by tim_mannire 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, $\displaystyle \frac{3^{x}+y-15^{y}}{3^{y}-2}$
yes, but it is 3 to the power of 3^(x+y)
About the only thing I can think of is this: $\displaystyle \frac{3^{x+y} - 15^y}{3^y - 2} = \frac{3^y(3^x - 5^y)}{3^y - 2}$
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