Question

Сократите дробь y2-z2/(z-y)2

Answer 1

$\frac{y^{2}-z^{2}}{(z-y)^{2}} = \frac{-(z^{2}-y^{2})}{(z-y)^{2}} = \frac{-(z-y)(z+y)}{(z-y)^{2}} = \frac{y+z}{y-z}$