1/(x + 2)  2/(x^2+5x+6)
Use FOIL: x^2 + 5x + 6 = (x + 3)(x + 2)
1/(x + 2)  2/((x + 3)(x + 2)))
multiply the first term by (x + 3)/(x + 3)
(x + 3)/((x + 3)(x + 2))  2/((x + 3)(x + 2)) = (x + 3  2)/((x + 3)(x + 2)) =
(x + 1)/((x + 3)(x + 2)) = (x + 1)/(x^2 + 5x + 6)
Mar 28

Adam S.