algebra 2
posted by BERNIE .
for the pair of functions,f(x)=2x and g(x)=6x^23x+6
find the following pairs
a)(f 0 g)(x), b)(f 0 g)(3) c) (g 0 f)(x) c)(g 0 f)(4)
I am haing trouble with these two, can you please help me
thankyou

I will use the more traditional way of writing these
(f 0 g)(x)
= f(g(x))
= f(6x^2  3x + 6)
= 2(6x^2  3x + 6) or 12x^2  6x + 12
(f 0 g)(3))
= 12(9)  6(3) + 12 = 138
or
g(3) = 6(9)  3(3) + 6 = 69
f(g(3)) = f(69) = 138
try the others the same way