No 6 ya mohon bantuannya

Luas = p x l
Karena p = 2l
p x l = 2l x l = 2lkuadrat
128 = 2l kuadrat
64 = l kuadrat
l = akar 64 = 8
Panjang sama dgn 2l = 2x8= 16

Luas = p × l
128 = 2(l) × l
l² = 128 / 2
l² = 64
l = √64 = 8
p = 2 × l
p = 2 × 8 = 16 (b)