K(x) = -3x^4 + 5x^3 - x + 7 for x = -2.

Question

K(-2) = -79

Answer 1

I got 1

-3 * 16 = -48
+5* 8 = 40
- -2 = 2
+7

= +1

Answer 2

-2*3 = -8, right?

Answer 3

-2^3