Question

If f(x)=1-x+x^2 and g(x)= square root of 5+x what is (f of g) (4)

Answer 1

$f(x) = 1-x +x^2 \\\\g(x) = \sqrt{5+x} \\\\g(4) = \sqrt{5+4} = \sqrt 9 =3\\\\(f \circ g)(4)\\\\=f(g(4))\\\\=f(3)\\\\=1-3+3^2 \\\\=-2+9\\\\=7$