Question 56355
This one is pretty easy, because you already have a common denominator:

x^2/(x+4)+8x+16/(X+4)
so you simply add your numerators
x^2+8x+16 and keep your denominator to get:
x^2+8x+16/(x+4), then factor numerator to get:
(x+4)(x+4) all over (x+4)
cancel out one in the numerator and one in the denominator which leaves you with:
(X+4) AS YOUR ANSWER