Question

$x + y \x - y$
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Answer 1

★Question★

$\frac{x + y}{x - y}$

★Answer ★

$\frac{x + y}{x - y} \\ \frac{(x + y)(x + y)}{(x - y)(x + y)} \\ \frac{(x + y) {}^{2} }{(x {}^{2} - y {}^{2} ) } \\ \\ \frac{x {}^{2} + 2xy + y { }^{2} }{x {}^{2} - y {}^{2} }$