Question 116842
I'll show you how this is done for one value, and then you can do the other.


{{{-x^2-5x-6}}}
{{{-(-3)^2-5(-3)-6}}}
{{{-9+15-6}}}
{{{0}}}


Just put the value you are supposed to use into the expression everywhere you see the variable, and then do the arithmetic.


If you are still having difficulty, write back.