Question

(7x4 + 11x3 – x2 – 8x + 6) – (-12x4 + 9x2 – 15)

A) -5x4 + 11x3 + 8x2 – 8x – 9
B) 19x4 + 11x3 – 10x2 – 8x + 21
C) 5x4 + 2x3 + 14x2 – 8x + 6
D) -19x4 – 2x3 – 8x2 – x + 9
E) -19x4 – 2x3 – 8x2 – x – 9

Answer 1

19x4+11x3−10x2−8x+21 is the answer when it is simplified.
The correct answer is B