Question 39135
We factor top and bottom "by grouping," so from
ay + 3a + 2y + 6 / ay + 3a + 5y + 15 =
a(y + 3) + 2(y + 3) / a(y + 3) + 5(y + 3) =
(a + 2)(y + 3) / (a + 5)(y + 3) =
(a + 2) / (a + 5)