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p+l = 52
p = 52-l
p x l = 672
(52-l)l = 672
52l-l² = 672
l²-52l+672 = 0
(l-28)(l-24) = 0
l = 28 atau l = 24
untuk L = 28, P = 52-28 = 24
untuk L = 24, P = 52-24 = 28
2 ( p + l ) = 104
p + l = 52
p = 52 - l
p × l = 672
672 = ( 52 - l ) l
672 = 52l - l²
l² - 52l + 672 = 0
( l - 28 ) ( l - 24 ) = 0
l = 28 atau l = 24
Nilai p untuk l = 28 :
p = 52 - l
p = 52 - 28
p = 24
Nilai p untuk l = 24 :
p = 52 - l
p = 52 - 24
p = 28