Jawabanmu

2014-06-11T11:59:09+07:00
P=7 cm, l=5 cm, K = 2(p+l) = 2*12 = 24 cm
Jawaban paling cerdas!
2014-06-11T12:00:38+07:00
Misal
P= x+2
l = x
L= 35cm^2
Maka
L=P.l
35 = (x+2).x
35= x^2 + 2x
0 = x^2 + 2x - 35
0 = (x + 7 )(x - 5 )
x = 7
x = 5

K = 2.(P+l )
   = 2(7+5)
  = 24 cm



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