Question

Simplify using the vertical method. (2k+3)(2k^2-4k-3)

Answer 1

4k^3 - 8k^2 + 6k^2 - 12k - 6k - 9
Combine like terms... -8k^2+6k^2= -4k^2
-12k+6k=-6k
and leave 4k^3 and -9 alone because you don't have anything to combine it with so the equation is  4k^3 -4k^2 -6k -9