Question 886911
The idea is that the polynomial divided by x+3 gives the value of P(-3) as the remainder.  Use synthetic division.



__________|___________________________
-3________|____-2_____1_____-2_____11
__________|___________6____-21_____69
_________________________________________
_______________-2_____7____-23_____80


The result is 80.
P(-3)=80.