Question

помогите с алгеброй, пожалуйста

Answer 1

1) $7.8 {m}^{2} {n}^{3} \times 5 {m}^{4} {n}^{11} = (7.8 \times 5) \times ( {m}^{2} \times {m}^{4} ) \times ( {n}^{3} \times {n}^{11} ) = 39 \times {m}^{2 + 4} \times {n}^{3 + 11} = 39 {m}^{6} {n}^{14}$

2) $4 {m}^{5} \times 2n = (4 \times 2) \times( {m}^{5} ) \times (n )= 8 {m}^{5} n$

3) $11 {m}^{6} \times 3 {n}^{14} = (11 \times 3) \times ( {m}^{6} ) \times ( {n}^{14} ) = 33 {m}^{6} {n}^{14}$

4) $5mn \times 4 {n}^{2} = (5 \times 4) \times (m) \times (n \times {n}^{2} ) = 20 \times m \times {n}^{1 + 2} = 20 m {n}^{3}$

5) $2 {m}^{11} \times 7.8m {n}^{6} = (2 \times 7.8) \times ( {m}^{11} \times m) \times ( {n}^{6} ) = 15.6 \times {m}^{11 + 1} \times {n}^{6} = 15.6 {m}^{12} {n}^{6}$

Одинаковая буквенная часть у одночленов с номерами $1$ и $3$