# Chapter P, Prerequisites - Section P.5 - Algebraic Expressions - P.5 Exercises: 78

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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