Question

xy - y2/ $\sqrt{xy}$ quando x= 1/2 e y=8

Answer 1

$\frac{xy - y^{2} }{ \sqrt{xy} }$
$\frac{ \frac{1}{2}.8 - 8^{2} }{ \sqrt{ \frac{1}{2}.8 } }$
$\frac{4 - 64}{ \sqrt{4} }$
$\frac{-60}{2}$
$-30$