Question 304822
2X+2Y=600 
X+Y=300
X=300-Y
XY=(300-Y)Y
300Y-Y^2
Y^2-300+22,500=22,500 COMPLETING THE SQUARE.
(Y-150)^2=22,500
Y=150 ANS. FOR THE SIDES OF THE SQUARE WITH AN AREA OF 22,500.