Question

(2m-n)(m-3n+4mn+8mn²)

Answer 1

Aplicando distributiva:

$2 {m}^{2} - 6mn + 8 {m}^{2} n + 16 {m}^{2} {n}^{2} ... \\ ... - mn + 3 {n}^{2} - 4m {n}^{2} - 8m {n}^{3}$

Reduciendo términos:

$16 {m}^{2} {n}^{2} + 8 {m}^{2} n + 2 {m}^{2} ... \\... - 7mn + 3 {n}^{2} - 4m {n}^{2} - 8m {n}^{ 3}$