Question

Find the value of the polynomial 4x^2 + 8 -8x^3 at x = -1​

Answer 1

Step-by-step explanation:

5x−4x

2

+3

given x=2

so substitute the x value in the above equation

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

=10-4(4)+3

=10-16+3

=10-13

=-3

the value of the polynomial 5x-4x^{2} +3 is -3

Answer 2

Answer:

20

Step-by-step explanation:

at x = -1,

4x²+8-8x³ = 4×-1×-1 + 8 -8×-1×-1×-1 = 4+8+8

=20

pls mark me brainliest!!