Jawabanmu

2014-09-06T20:40:31+07:00
Mungkin

keliling = (2x-3) + (3x +1) + (3x +1)
= 2x + 3x + 3x -3 + 1 + 1
= 8x - 1
1 3 1
2014-09-06T20:42:34+07:00
K = alas + 2sisi
k = (2x + 3) + 2.(3x+1)
   = (2x + 3) + (6x + 2)
   = 2x + 6x + 3 + 2
   = 8x + 5