Question

A rais quadrada 2x sobre 2 +y, para x=-2 e y=8

Answer 1

$\sqrt{\dfrac {2.x}{2 + y}}\\ \\ \\ \sqrt{\dfrac {2.-2}{2 + 8}}\\ \\ \\ \sqrt{\dfrac {-4}{10}}\\ \\ \\ \dfrac{ \sqrt{-4} }{ \sqrt{10 }} \\ \\ \\ \dfrac{ i.\sqrt{4}. \sqrt{10 } }{ \sqrt{10 }. \sqrt{10 }} \\ \\ \\ \dfrac{ 2 i.\sqrt{10 } }{10} \\ \\ \\ =\ \textgreater \ \dfrac{ \sqrt{10 } .i}{5}$