Question

помогите сократить дробь

Answer 1

1.

$\frac{49k {(z - y)}^{2}}{ {7k}^{2} {(y - z) }^{2} } = \frac{49k {(z - y)}^{2}} { - {7k}^{2} {(z - y) }^{2} } = \: \frac{49k } { - {7k}^{2} } = \frac{7}{ - k}$

2.

$\frac{4(u - v) \times (u + v)}{8(u + v) \times (u - v)} = \frac{4}{8} = \frac{1}{2}$