Question

Помогите пожалуйста!! y/y^2-4 - 1/y-2

Answer 1

$\frac{y}{ {y}^{2} - 4} - \frac{1}{y - 2} = \\ = \frac{y}{(y - 2)(y + 2)} - \frac{1}{y - 2} = \\ = \frac{y - (y + 2)}{ (y - 2)(y + 2)} = \\ = - \frac{2}{ {y}^{2} - 4} = \frac{2}{4 - {y}^{2} }$

Answer 2

y/y^2-4 - 1/y-2

у-(у+2)/(у-2)(у+2)

у-у-2/у^2-4

-2/у^2-4