Question

Evaluate-2x3 - 2x2 - 4x-2 for x=-2.
A.-18
B. 16
C. -2
D. 14

Answer 1

14

Explanation:

-2x^3 - 2x^2 - 4x-2

Let x = -2

-2 (-2)^3 - 2 (-2)^2 -4(-2) -2

Exponents first

-2 (-8) -2 (4) -4(-2) -2

Then multiply

16 -8 +8 -2

Then add and subtract

14