Question

Evaluate the expressions given below for a= -4 a^3 +2 a^2-a-5​

Answer 1

Answer:

a=-4

a^3 +2 a^2 - a -5

= -4^3 + 2 (-4)^2 - (-4) - 5

= -64 + 2 (16) + 4 -5

= -64 + 32 +4 - 5

= -69 + 36

= -33