Question

If f(x)=3x^2-4 and g(x)=x+2, find (f-g)(x)?

Answer 1

`3x^2-x-6`

Explanation:

`f-g(x)=f(x)-g(x) rarr` Subtract the functions

`3x^2-4-(x+2)`

`3x^2-4-x-2 rarr` Distribute the negative out

`3x^2-4-2-x rarr` Combine like terms

`3x^2-6-x`

`3x^2-x-6 rarr` Rearrange to put the variables first