Question

x+y=√5
xy=2

hallar:
x/y + y/x

Answer 1

$\frac{x}{y} + \frac{y}{x} = \frac{ {x}^{2} + {y}^{2} }{xy}$
${x}^{2} + {y}^{2} = 1$
$xy = 2$
$\frac{ {x}^{2} + {y}^{2} }{xy} = \frac{1}{2}$
RPT

$\frac{1}{2}$