Which expression is equivalent to $(3x^3 - x^2 + 4)(5x^2 + 8x)$?

Question

Prompt

Which expression is equivalent to

(3 x^{3} - x^{2} + 4) (5 x^{2} + 8 x)

15 x^{5} + 19 x^{4} - 8 x^{3} - 20 x + 32

15 x^{5} + 19 x^{4} - 8 x^{3} - 20 x^{2} + 32

15 x^{5} + 19 x^{4} - 8 x^{3} + 20 x^{2} + 32 x

15 x^{5} + 29 x^{4} - 8 x^{3} + 20 x^{2} + 32 x