Question

(X 1/2 - y1/2) x 1/2 y 1/2

Answer 1

$xy ^{4/2} -x ^{1/2}y$

Answer 2

$( x^{ \frac{1}{2} } - y^{ \frac{1}{2} }) x^{ \frac{1}{2} } y^{ \frac{1}{2} } =x y^{ \frac{1}{2} } -y x^{ \frac{1}{2} } =x \sqrt{y} -y \sqrt{x}$