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SAT® Subject Test in Math 1 & 2

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Difference of Squares

SATSTM-OQTZEX

For the expression below, if $x$ and $y$ are both positive, then what is the simplified version of this expression?

$$\cfrac{{x}^{2}-{y}^{2}}{x+y}$$

A

$2xy$

B

$x+y$

C

$x-y$

D

$xy$

E

$\text{None of the above}$