tolong jawab dgn caranya

P=x +, 10
l = x + 3
L = P x l.
450 = (x + 10) (x + 3)
450 = x2 + 13 x + 30
X2 + 13 x - 420 = 0
(x+ 28) (x - 15) = 0
x = 15
Luas kebun pak Andi = 15 x 15 = 225 m persegi.