Question

F(x) = x^2 - 5

g(x) = 4x - 4

Find (f-g) (5)

4

-5

-4

5

Answer 1

4

Explanation:

f(x) = x^2 - 5

g(x) = 4x - 4

(f-g) (x)= x^2 - 5 - (4x - 4)

Distribute the minus sign

= x^2 - 5 - 4x + 4

= x^2 -4x-1

Let x = 5

(f-g) (5) = 5^2 -4(5) -1

=25 - 20 -1

=5-1

=4

Answer 2

The correct answer option is: 4.

Explanation:

We are given the following two functions and we are to find the value of
`( f - g ) ( 5 )`:

`f(x) = x^2 - 5`

`g(x) = 4x - 4`

Finding
`( f - g ) ( x )`:

`( f - g ) ( x )`
`= (x^2-5)-(4x-4) = x^2-4x-5+4`

`( f - g ) ( x ) = x^2-4x-1`

So,
`( f - g ) ( 5 ) = (5)^2-4(5)-1 = 4`