Question

Помогите пожалуйста,заранее огромное спасибо!))

Answer 1

▪а)
$\frac{16 {x}^{3} {y}^{2} }{15x {y}^{3} } = \frac{16 {x}^{2} }{15y}$
▪б)
$\frac{2b + 18}{ {b}^{2} + 18b + 81} = \frac{2(b + 9)}{ {(b + 9)}^{2} } = \frac{2}{b + 9}$
▪в)
$\frac{ {y}^{2} - 2y + 1}{1 - y} = \frac{ {(y - 1)}^{2} }{ - (y - 1)} = - (y - 1) = 1 - y$
__________________________

▪а)
$\frac{14 {b}^{3} }{21b} = \frac{2 {b}^{2} }{3} = \frac{2}{3} {b}^{2}$
▪б)
$\frac{ {x}^{2} - 9}{3x - 9} = \frac{(x - 3)(x + 3)}{3(x - 3)} = \frac{x + 3}{3}$
▪в)
$\frac{5y - 10 {y}^{2} }{2y - 1} = \frac{5y(1 - 2y)}{ - (1 - 2y)} = - 5y$