Question

f(x)=x+5, g(x)=-4x^2+11x+2
Find (fg)(3)

Answer 1

f(3) = 8
g(3) = -1
(fg)(3) = 8 x -1 = -8

Answer 2

where did you get the (fg)(3)=8x-1=-8

Answer 3

moneybird is saying (fg)(3) means f(3) g(3), the x means times.
Does (fg) mean multiply, or composition?

Answer 4

multiply

Answer 5

So the answer is 8 times -1 = -8
you could also multiply out
(x+5)(-4x^2+11x+2), and then plug in x=3, and you would get -8.
However, that's a lot of work.