Question

6m(2-m)+(-m+m2)-9(-m-2m2)

Answer 1

Ответ:

$6m(2 - m) + ( - m + m2) - 9( - m - 2m2) \\ 12m - 6 {m}^{2} + ( - m + 2m) - 9( - m - 4m) \\ 12m - 6 {m}^{2} + m - 9( - 5m) \\ 12m - 6 {m}^{2} + m + 45m \\ 58m - 6 {m}^{2}$