Answers

2015-06-12T20:05:34+05:30
9(x-2y)^2 - 4(x-2y)-13
= 9(x-2y)^2 + 9(x-2y) - 13(x-2y)-13
= 9(x-2y) [ (x-2y) + 1 ] – 13 [ (x-2y) + 1 ]
= [ (x-2y) + 1 ] [ 9(x-2y) + 1 ]
= [ (x-2y) + 1 ] [ 9x - 18y + 1 ]
= (x-2y+1)(9x-18y+1)
2 2 2