Question

factorise :
9(x+y)²-4(x+y)


please answer in steps !!​

Answer 1

Answer:

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)(9x−18y−13)