Answer: -54
Step-by-step explanation:
Since we are given k=-3 and n=-5 along with the expression -k²-(5k-9n)+3n, we plug them in and solve.
-k²-(5k-9n)+3n [plug in k=-3 and n=-5]
-(-3)²-(5(-3)-9(-5))+3(-5) [parentheses]
-9-(-15+45)-15 [parenthesis]
-9-30-15 [subtract]
-54
Now, we know that -54 is the answer when k=-3 and n=-5.
