Question

Упростите выражение: 

$frac{(x^{2} - y)(y + xsqrt{y}+ x^{2})}{ysqrt{y}-x^{3}}$

Answer 1

$frac{(x^{2}-y)(y+xsqrt{y}+x^{2})}{ysqrt{y}-x^{3}}= frac{(x^{2}-y)(y+xsqrt{y}+x^{2})}{(sqrt{y})^{3}-x^{3}}=frac{(x^{2}-y)(y+xsqrt{y}+x^{2})}{(sqrt{y}-x)(y+xsqrt{y}+x^{2})}=$

=$frac{(x-sqrt{y})(x+sqrt{y})}{sqrt{y}-x}=-(x+sqrt{y})=-x-sqrt{y}$