Answers

2015-01-27T10:43:35+05:30
(a-b)²=a²-2ab+b²
=9a²-6a+1-6a+2
=9a²-12a+3
=9a²-9a-3a+3
=9a(a+1)-3(a+1)
=(a+1)(9a+3)
0
2015-01-27T11:50:23+05:30