Jawabanmu

2014-08-26T18:05:35+07:00
Keliling persegi
= 2p + 2l
=2(x+5) + 2(x^+8x+15)
=2x+10+2x^+16x+30
=2x+16x+10+30+2x^
=(18x+40+2x^) cm

ket: ^ = kuadrat