Use long division to find the quotient below. (5x5 -5x3 - 10x2 - 80x) = (x+2)
A. 5x4 + 6x3-12x2 - 40x
B. 584 - 6x3 + 12x2 - 40x
C. 5x4 + 10x3 - 15x2 - 40x
D. 5x4 - 10x + 15x2 - 40x​