Jawabanmu

2014-05-28T00:33:06+07:00
2p+2l=2x+24
2p+2(8-x)=2x+24
2p+16-2x=2x+24
p=2x+12

L = p.l
=(2x+12)(8-x)
=16x-2x^2+96-12x
=-2x^2+4x+96

Lmaks jka
L'=0
-4x+4=0
x=1

kelliling= 2x+24
2.1 +24
26
jadi, kelilingnya 26