Answer:
Step-by-step explanation:
It is given that [tex]f(x) = 1 - x + x^{2}[/tex] and [tex]g(x) = \sqrt{x + 5}[/tex]
(f•g)(x) = f(g(x)) = [tex]1 - g(x) + g(x)^{2}[/tex] = [tex]1 - \sqrt{x + 5} + (x + 5)[/tex]
Putting x = 4 in the above equation, we get (f•g)(4) = [tex]1 - \sqrt{5 + 4} + (5 + 4)[/tex] = 1 +9 - 3 = 7
