Question

решите уравнение y^2/y-5=25/y-5

Answer 1

$\frac{y^{2} }{y-5}=\frac{25}{y-5}\\\\\frac{y^{2} }{y-5}-\frac{25}{y-5}=0\\\\\frac{y^{2}-25 }{y-5} =0\\\\\frac{(y-5)(y+5)}{y-5}=0\\\\\left \{ {{y+5=0} \atop {y-5\neq0 }} \right.\\\\\left \{ {{y=-5} \atop {y\neq 5}} \right.$

Ответ : - 5