Answer:
-36
Step-by-step explanation:
1. Plug -3 into the equation given: -3(15-(-3)+2(-3)^2
2. Use Pemdas and first distribute the negative to negative three then distribute -3 to the rest of the parenthesis (final answer): -45-9 +2(-3)^2
3. Then put -3 to the power of 2 (which is 9) then multiply it by 2 (final answer): -45-9+18
4. Combine all like terms and you get the answer -36!