What is the sum (6x³ – 5x² 3x – 5) (8x4 3x³ 5x² x⁴)? question 12 options:
a) 9x⁵ 8x⁴ 4x² – 1
b) 8x⁴ 9x³ 4x – 1
c) 8x⁴ 3x³ – 10x² 4x – 1
d) 8x⁴ – 3x³ 10x² – 2x⁵