Question

If f(x) = 2x2 + 1 and g(x) = x2 – 7, find (f – g)(x).

Answer 1

3x2 - 6 its the answer

Answer 2

Answer: The required value is

`(f-g)(x)=x^2+8.`

Step-by-step explanation: The given functions are:

`f(x)=2x^2+1,\\\\g(x)=x^2-7.`

We are given to find the value of
`(f-g)(x).`

We know that, if s(x) and t(x) are any two functions of a variable x, then we have

`(s-t)(x)=s(x)-t(x).`

Therefore, we have

`(f-g)(x)\\\\=f(x)-g(x)\\\\=(2x^2+1)-(x^2-7)\\\\=2x^2+1-x^2+7\\\\=x^2+8.`

Thus, the required value is

`(f-g)(x)=x^2+8.`