PP-T2-PS150

[max999]

The area of a square garden is A square feet and the perimeter is P feet. If A = 2P + 9, what is the perimeter of the garden, in feet?

(A) 28
(B) 36
(C) 40
(D) 56
(E) 64

[pigeon]

The side of this square = (P/4). Therefore, A = (P/4)^2 = (P^2/16).
=> P^2 / 16 = 2P + 9
=> Solve this equation
=> P = 36 or -4