Question

Ребят помогите решить плиз

Answer 1

$6) \frac{mn}{mp} = \frac{n}{p}$

$7) \frac{ - a^{2} + 2ab - b ^{2} }{2a - 2b} = \frac{ - (a - b) ^{2} }{2(a - b)} = - \frac{a - b}{2}$

8)

$\frac{4c^{2} - 1 }{1 - 4c + 4c {}^{2} } = \frac{2c + 1}{2c - 1}$

11)

$\frac{by}{cy} = \frac{b}{c}$

13)

$\frac{9c^{2} - 4}{(3c - 2)^{2} } = \frac{(3c - 2)(3c + 2)}{(3c - 2) {}^{2} } = \frac{3c + 2}{3c - 2}$