30xy
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60xy
Find the greatest common divisor 15xy55y? 15xy = (3)(5)(x)(y) & 55 y = (5)(11)(y). The common factors are 5 & y. Hence 5y = gcf of 15xy & 55y.
The LCM of these numbers is 25y. LCM is Least Common Multiple.
(2x + 3y)(2x + 5y)
2(x - 5y)