36y to the second power
18xy is the GCF of 72x2y and 18xy
GCF(18xy, 15xy) = 3xy LCM(18xy, 15xy) = 90xy
12
xy
The GCF is 6xy. The LCM is 72xy2
63
The GCF is 9xy. The LCM is 36x^2y^3.
It is -18xy
2 times 3 times 3 times x times y = 18xy
36y^2 - 1 = (6y - 1)(6y + 1)
72xy