Answer
x-y
Work Step by Step
(A+B)(A-B)=A$^2$-B$^2$
(x$^\frac{1}{2}$+y$^\frac{1}{2}$)(x$^\frac{1}{2}$-y$^\frac{1}{2}$)
(x$^\frac{1}{2}$)$^2$-(y$^\frac{1}{2}$)$^2$
x$^\frac{2}{2}$-y$^\frac{2}{2}$
x-y
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