- (-m) for m = 12
Evaluate this expression
I am a bit confused by this but I got the answer of just 12. Am I right?
I know this is extremely easy question

If m = 12, then -m = -12. Now a -(-) means a negative 1 times negative 1. A negative number times a negative number equals a positive number. So -(-12) equals -1 times -12 which equals 12.

You're correct. Glad to see you tried instead of just asking for help.

TJ, pready showed the OP how to work it out.