19. 4k^2(-3k^2-4k+5)

A. -12k^4-16k^3+20k^2
B. 12k^4-16k^3=9k^2
C. -12k^3+20k **
D. k^4+9k^2

1 answer

C cannot be right, since it only has two terms.

Take another stab at it and see whether you can come up with (A)