Question

y²+8y-4y+4 / 4-y²= скок

Answer 1

$\frac{ {y}^{2} + 8y - 4y + 4 }{4 - {y}^{2} } = \frac{ {y}^{2} + 4y + 4 }{4 - {y}^{2} } = \frac{ {(y + 2)}^{2} }{(2 - y)(2 + y)} = \frac{y + 2}{2 - y}$