Question 377866
{{{(z^2-49)/(z+7)}}}
I'm going to assume that your question is asking you to simplify it?


So since we have {{{(z^2-49)/(z+7)}}}

The first step we should take is to factor the numerator.


{{{z^2-49}}}
=(z+7)(z-7)


So now we have {{{((z+7)(z-7))/(z+7)}}}
From here, we can cancel out the z+7 on the top and bottom,
which leaves us with z-7.