Let

\[f(x) = \begin{cases} x^2+9 &\text{if }x<-5, \\ 3x-8&\text{if }x\ge-5. \end{cases} \]

If $f(x)=10$, find the sum of all possible values of x.

How do I react when I see 'asap', or 'it is an emergency' etc ??

I delay any answer I may ever give. Your question is no more important than anyone else's.

In fact, if a member, who has made a good impression, asks a question, it has far greater importance than yours.

yes. asap=emergency

'asap' means you are being demanding and slightly rude.

We are here to teach, not to give you instant answers so that you can cheat and/or go off and do whatever else you want to do.