b³ - 2ac + d²
a = 2
b = -3
c = 4
d = -5
In order to evaluate the given polynomial, we need to replace each letter by its corresponding value:
b³ - 2ac + d²
(-3)³ - 2 * 2 * 4 + (-5)²
(-3) * (-3) * (-3) - 4 * 4 + (-5) * (-5)
9 * (-3) - 16 + 25 , because the product of two negative numbers equals a positive number
-27 - 16 + 25
-27 + 9
-18
