Question

Let f(x)=49 -x^2, g(x)=7-x. Find (f-g)(x)

Answer 1

(f-g)(x) just it as u just solve the subtraction question
(f-g)(x) = 49 -x^2 -(7-x)
= 49 -x^2 -7 +x
= -x^2 + x + 42 is the correct answer

Answer 2

thanks so much for showing the steps also. helps alot. (: Would you help me on the 2nd too?

Answer 3

for second question
first find
(gof)(x) = g(f(x))
= g(x^2+3 )
=x^2+3 +5 / x^2 +3
= x^2 +8/x^2 +3
now put 4 at the place of x
(gof)(4) = (4)^2 +8 / (4)^2 +3
= 16 +8 / 16 +3
=24 /19 is the correct answer

Answer 4

Thank you!

Answer 5

welcome