Jawapan

2016-05-31T00:13:48+08:00
3(3n-4)(3n-4)
= darab kurungan dahulu baru darab dgn 3 kat luar tu
2016-05-31T02:11:40+08:00
3(3n - 4)^2
= 3 x (3n - 4)^2

sama mcm

3(2)^3
= 3 x 2^3