Question 67386
the answers will be in red<br>

A.)(f-g)(3)
(f-g) 
= 3x^2-(x-2/x)
=3x^2-x+2/x
=x(3x^2-x+2/x)
=3x^3-x^2+2<br>

(f-g)(3)
=3(3x^3-x^2+2)
<font color = red>=9x^3-3x^2+6</font><br>

B.)(f/g)(3)
(f/g)
=3x^2/(x-2/x)
=3x^2/(x(x-2/x))
=3x^2/(x^2-2)<br>

(f/g)(3)
=3(3x^2/(x^2-2))
<font color = red>=9x^2/(x^2-2)</font><br>

C.)(g of f)(3)
g(f(x))
=3x^2-2/3x^2
=3x^2(3x^2-2/3x^2)
9x^4-2<br>

(g of f)(3)
=3(9x^4-2)
<font color = red>27x^3-6</font>