Use the function f(x)=2x³ +4 and g(x)=5x to find the value of expression f(3) - 2g(3).

Thanks for asking this interesting question.

Find f(3)

Find g(3)

Now

hello from mrbilldoesmath!

answer:

x - 3

discussion:

x^2 - 9 = (x-3) (x+3)   so

(x^2-9)/ (x + 3) = x-3

you,

mrb

72 is the answer to this problem