(7/2-y)y=3

y^2-7/2y+3=0

2y^2-7y+6=0

(2y-3)(y-2)=0

X=2, y=3/2 or

x=3/2，y=2

For any a, let the area be a and the circumference be c.

y^2-c/2y+a/2=0

Get the solution of the solution