Jawapan

2015-10-11T19:18:58+08:00
(x +1)^2 /6 X 2 / (x^2 -1)

= (x +1)^2 /3 X (x^2 -1)

= (x +1)(x +1) / 3(x -1)(x +1)

= (x +1) / 3(x-1)