csmith3936 csmith3936 10-10-2019 Business contestada Perform the indicated operation. (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