Question

Giving that f(x)=19x and g(x)= -3x-4 what is (fg)(x)

Answer 1

Given the functions below

`f\mleft(x\mright)=19x\text{ }and\text{ }g\left(x\right)=-3x-4`

To find the composite function (fg)(x),

`(fg)(x)=(19x)(-3x-4)`

Expand the brackets

`(fg)(x)=-57x^2-76x`

Hence, the answer is

`-57x^2-76x`