Answer:
-22.5
Step-by-step explanation:
Put the numbers in place of the variables and do the arithmetic. This might be easier of you factor the expression first. Your calculator can do this evaluation.
a^2y +a^3 = a^2(y +a)
= (-1.5)^2(-8.5 -1.5) = 2.25(-10) = -22.5
