Question

ДОПОМОЖІТЬ БУДЬ ЛАСКА СТАВЛЮ ВСІ БАЛИ

Answer 1

$1 \: \: \: \: \: 6m \times 0.5mn - 2m( - {n}^{2} ) + n \times mn = 3 {m}^{2} n - ( - 2 {mn}^{2} ) + {mn}^{2} = 3 {m}^{2} n + 2 {mn}^{2} + {mn}^{2} = 3 {m}^{2} n + 3 {mn}^{2} = 3mn(m + n)$

$2 \: \: \: \: \: 9m \times - \frac{1}{3} {n}^{2} - (- 3 {m}^{2} n + {mn}^{2} ) = - 3 {mn}^{2} + 3 {m}^{2} n - {mn}^{2} = 3 {m}^{2} n - 4 {mn}^{2}$

$3 \: \: \: \: \: ( { - n)}^{2} \times 2m - (3 {m}^{2} n - 2 {mn}^{2} ) = - 2 {mn}^{2} - 3 {m}^{2} n + 2 {mn}^{2} = - 3 {m}^{2} n$

$4 \: \: \: \: \: - \frac{1}{4} {m}^{2} \times 32n + ( {m}^{2} n - 3 {mn}^{2} ) = - 8 {m}^{2}n + {m}^{2} n - 3 {mn}^{2} = - 7 {m}^{2} n - 3 {mn}^{2}$