Question

f(X) =2 (√5-x)
g(x)= (√x^2-9)

find f+g
how do i combine these

Answer 1

put a plus sign between them. really that is it

Answer 2

oh wow. so u cant add the square roots together right? thank you

Answer 3

you cannot combine then in to one radical though!

Answer 4

i am assuming it is
\[f(x)=2\sqrt{5-x}\]
\[g(x)=\sqrt{x^2-9}\] so
\[(f+g)(x)=2\sqrt{5-x}+\sqrt{x^2-9}\]

Answer 5

thanks