Question

If. F(x) =-3x2-2 and g(x)=4x+2 what is value of (f+g)(2)

Answer 1

`(f + g) (2) = -4`

Explanation:

We have the functions

`F(x) =-3x^2-2`

And

`g(x)=4x+2`

We want to find
`(f + g) (x)`

Then

`(f+g)(x) = f(x) + g(x)\\\\(f+g)(x) = -3x^2-2 + 4x+2\\\\(f+g)(x)= -3x^2 +4x`

finally we find
`(f + g) (2)`

`(f + g) (2) = -3(2)^2 + 4(2)\\\\(f + g) (2) = -3*4 + 8\\\\(f + g) (2) = -12+ 8\\\\(f + g) (2) = -4`

Answer 2

(f+g)2 = 20

Explanation:

18. if F(x) =-3x2-2 and g(x)=4x+2 what is value of (f+g)(2)?

We know, (f+g)2= f(2) + g(2)

We will put 2 in the place of x for f(x) and g(x) and then find their result.

Solving:

(f+g)2= f(2) + g(2)

=3(2)^2 -2 + 4(2) +2

= 3(4) -2 + 8 +2

= 12 -2 +8 +2

= 20

So, (f+g)2 = 20