Question

find the following: (k-g)(5)
if g(x)= square root of x-3 and k(x)=x2+5

Answer 1

?

Answer 2

subtract function and then plug in number

Answer 3

Is your question: 5*( sqrt{x-3} - (x²+5))=?

Answer 4

yes it is.

Answer 5

really, are you sure it is not
F[5]=Sqrt[x-3]-x^2+5

Answer 6

Either way, it contains complex numbers so am not even gonna bother.

Answer 7

yes this is the problem. (k-g)(5)
if k(x)= x^2+5 g(x)=sqrt{x-3}

Answer 8

You substitute.

if you know what g and k equal, or at least have a formula, you can plug it in to the original equation.