You can put this solution on YOUR website!
This one is pretty easy, because you already have a common denominator:
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