Question

Упростите выражение:1) Зm2-n * 0,4mn3;2) 7 1/3 b3c2* a4b5,​

Answer 1

Объяснение:

1)

$3m2 - n \times 0.4mn3 =$

$= 6m - n \times \frac{2}{5}m \times 3 =$

$= 3m \times 2(1 - \frac{1}{5} n {}^{2} ) =$

$= 3m - 2 \times \frac{1}{5} \times (5 - n {}^{2} ) =$

$= \frac{6}{5} m \times (5 - n {}^{2} ) =$

$= 1.2m \times (5 - n {}^{2} ).$

$= 3m(2 - n {}^{2} \times \frac{2}{5} ) =$

Answer 2

1. Зm2-n * 0,4mn3 = 0,4m^(2+n) * n^3

2. 7 1/3 b3c2 * a4b5 = 22/3 a^4 b^8 c^2