How do I simplify (2m-4)(m^2+2m+4)?

Question

I appreciate your help,thank you.

Answer 1

(2m-4)(m^2+2m+4) = 2m^3 + 4m^2 + 8m-4m^2-8m-16 = 2m^3-16 = 2(m^3-8).