Question

выполните действия пжжжжжж срлчнооо​

Answer 1

Объяснение:

1)

$\frac{14 {m}^{4}c }{ {n}^{6} } \times \frac{ {n}^{5} }{35m {c}^{6} } = \frac{14 {m}^{4}c{n}^{5} }{35m {c}^{6}{n}^{6}} = \frac{2}{3} {m}^{4 - 1} {c}^{1 - 6} {n}^{5 - 6} = \frac{2}{3} {m}^{3} {c}^{ - 5} {n}^{ - 1} = \frac{2 {m}^{3} }{3 {c}^{5} {n} }$

2)

$\frac{36 {x}^{3} }{ {y}^{2} } \div (9 {x}^{6} y) = \frac{36 {x}^{3} }{ {y}^{2}9 {x}^{6}y } = \frac{4}{ {x}^{3} {y}^{3} }$

3)

$\frac{8m + 8n}{ {a}^{5} } \times \frac{5 {a}^{10} }{ {m}^{2} - {n}^{2} } = \frac{8(m + n)}{ {a}^{5} } \times \frac{5 {a}^{10} }{(m - n)(m + n)} = \frac{40{a}^{5} }{m - n}$

4)

$\frac{3x - 15}{x + 4} \div \frac{ {x}^{2} - 25}{3x + 12} = \frac{3(x - 5)}{ x + 4} \div \frac{(x - 5)(x + 5)}{3( x+ 4)} = \frac{3(x - 5)}{ x + 4} \times \frac{3(x + 4)}{(x - 5)(x + 5)} = \frac{9}{x + 5}$