Question

Necesito ayuda con esto gracias

Answer 1

$\left(\frac{1}{3}x+\frac{2}{5}y-2\right)^2$
$\frac{1}{3} x= \frac{x}{3}$
$\frac{2}{5} y= \frac{2y}{5}$
$=\left(\frac{x}{3}+\frac{2y}{5}-2\right)^2$


$\left(\sqrt{7}-\sqrt{2}\right)^2$
$=\left(\sqrt{7}\right)^2-2\sqrt{7}\sqrt{2}+\left(\sqrt{2}\right)^2$
$=9-2\sqrt{14}$