what is the least common denominator between (a^2-36) and (a^2+5a-6)
a^2 - 36 factors as ( a + 6) ( a - 6)
a^2 + 5a - 6 factors as ( a + 6 ) (a - 1)
So.....the lcd = ( a - 6 ) ( a + 6) ( a - 1)
