Question

ПОМОГИТЕ С ЗАДАНИЕМ​

Answer 1

$ttdisplaystyle frac{y^2-2}{2y^2-4ysqrt{2}+4}=frac{(y-sqrt{2})(y+sqrt{2})}{(sqrt{2}y)^2-2sqrt{2}y+2^2} =frac{(y-sqrt{2})(y+sqrt{2})}{(sqrt{2}y-2)^2}=frac{(y-sqrt{2})(y+sqrt{2})}{2(y-sqrt{2})^2}\\=frac{y+sqrt{2}}{2(y-sqrt{2})}$

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