Question

2. выполните действия:​

Answer 1

Ответ:

a)

$\frac{14x - 9}{17x} + \frac{3x - 25}{17x} = \frac{14x - 9 + 3x - 25}{17x} = \\ = \frac{17x - 34}{17x} = \frac{17(x - 2)}{17x} = \frac{x - 2}{x}$

b)

$\frac{3}{5a} - \frac{5}{4a} = \frac{3 \times 4 - 5 \times 5}{20a} = \\ = \frac{12 - 25}{20a} = - \frac{13}{20a}$

в)

$\frac{ax + ay}{x {y}^{3} } \times \frac{ {x}^{3}y }{8x + 8y} = \frac{a(x + y) \times {x}^{2} }{ {y}^{2} \times 8(x + y) } = \\ = \frac{a {x}^{2} }{8 {y}^{2} }$

г)

$( \frac{4 {c}^{5} }{7b {}^{3} } ) {}^{2} = \frac{16 {c}^{10} }{49 {b}^{6} }$