Question

Pls help me. I forgot the way to do it ​

Answer 1

Solution :

$( { \frac{x}{2} })^{2} + ( { \frac{y}{3} })^{2} \: + 2 \frac{xy}{5 }$

$\frac{ {x}^{2} }{4} + \frac{ {y}^{2} }{9} + \frac{2xy}{5}$