Question

упростите вырожение


.......♡пожалуйста♡.......

Answer 1

$= \frac{cb - c(b - c)}{b(b - c)} \times \frac{ {b}^{2} }{ {c}^{2} } = \frac{cb - cb + {c}^{2} }{b(b - c)} \times \frac{ {b}^{2} }{ {c}^{2} } = \frac{ {c}^{2} \times {b}^{2} }{ {c}^{2} \times b(b - c)} = \frac{b}{b - c}$