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Ob prostokąta = (x-1) * 2 + (x+2) * 2 = 2x - 2 + 2x + 4 = 4x +2
(4x+40)-(4x+2)=38
L2 = 2*(x -1) +2*(x +2) = 2x -2 + 2x +4 = 4x +2
L1 - L2 = (4x + 40) - (4x + 2) = 38
Odp. O 38.
4x + 40 -obwód kwadratu
2x-2 +2x + 4 = 4x + 2 obwód prostokąta
obwód kwadratu jest większy o 38