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Lp = 40
2(p+l) = 40
p+l = 20
x = 20 - l
p × l = 96
(20-l) × l = 96
20l - l² = 96
l² -20l +96 = 0
(l-12)(l-8) = 0
l = 12
l = 8
l = 12 , x = 8 = p
l = 8 , x = 12 = p