What is the composition (f∘g)(x)(f \circ g)(x)(f∘g)(x) if f(x)=x2+3f(x) = x^2+3f(x)=x2+3 and g(x)=x−3g(x) = \sqrt{x-3}g(x)=x−3?
xxx
x+6x+6x+6
x2−3x^2-3x2−3
x2+3−3\sqrt{x^2+3-3}x2+3−3