find rectangels sides trough area

Question

1 side of the rectangle is x long, and the rectangles area is 45m^2 find how long a,b,c and d are to show that you can represent the rectangles circumference trough ax^2+bx+c/x+d

Answer 1

one side = x m

the other side = 45/x m

Perimeter = 2x + 90/x meters

a=0, b=2 c=90 d=0