Step-by-step explanation:

g(-5)=5x²-11x-8

you need to substitute all x as -5

g(-5)=5(-5)²-11(-5)-8

next is to perform all the operations. PEMDAS.

g(-5)=5(25)+55-8

g(-5)=125+55-8

g(-5)=180-8

g(-5)=172

hope it helps!