Mathematics, 02.09.2019 15:30 pruittjr5161

Hello, i need to know how to solve this and get -1 as an answer
$\frac{x { }^{ - 1} + y { }^{ - 1} - 2x {}^{ - \frac{1}{2} }y {}^{ - \frac{1}{2} } }{ x {}^{ - 1} - y {}^{ - 1} \ } \times \frac{x {}^{ \frac{1}{2} } + y {}^{ \frac{1}{2} } }{x {}^{ \frac{1}{2} } - y {}^{ \frac{1}{2} } } = - 1$

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Hello, i need to know how to solve this and get -1 as an answer
[tex] \frac{x { }^{ - 1} + y {...