[tex]\huge\pmb{Hello!}[/tex]
The answer is -10.
Remember the rule:
A positive times a positive is a positive
A negative times a positive is a negative
A negative times a negative is a positive
Thus, the answer is -10.
Hope it helps! Enjoy your day!
~Just a determined gal
[tex]\bf{erutaN\:tneliS[/tex]