Aria unui pătrat = l^2
In cazul nostru, l = (radical 27 - 3 radical 2) dm
Aria patratului = (radical 27 - 3 radical 2)^2 = ( 3 radical 3 - 3 radical 2)^2 = [3(radical 3 - radical 2)]^2 = 9 × (radical 3 - radical 2)^2 = 9 × (3 - 2 radical 6 + 2) = 9 × (5 - 2 radical 6) dm patrati
R: Aria patratului = 9(5-2 radical 6) dm patrati
