Question

If f(x) = 2x2 + 3x and g(x) = x – 2, what is (f + g)(2)?
a. 16
b. 14
c. 12
d. 10
e.8
helpp

Answer 1

Since it is asking f+g, you need to add the two expressions together. After simplifying, substitute the x for 2 for your final answer.

Answer 2

its f(x)=2^2+3x and g(x)=x-2 what is (f+g)(2)
so what i got it would equal 22

Answer 3

f+g=2x^2+3x+(x-2)

Simplify, then substitute the x with 2.

Answer 4

i got 21

Answer 5

the question is asking for (f+g)(2) so let's figure out the f(x) + g(x) portion first.
so we have \[f(x)= 2x^2 +3x\] and \[g(x) = x-2 \]
so what is f(x)+g(x)

Answer 6

then after obtaining f(x)+g(x) we combine like terms
finally evaluate f(x)+g(x) when x = 2

Answer 7

kinda confused still lol sorry

Answer 8

let's take it one step at a time by first understanding that (f+g)(2) means that we need to find f+g and then evaluating the result of f+g when x = 2

Answer 9

okay

Answer 10

so we just have to add because f(x) + g(x) means the f function + g function

so given \[f(x) = 2x^2+3x \] and \[.g(x) = x-2 \]
what is f(x) +g(x)
the notation I'm using is the same as f+g

Answer 11

okay

Answer 12

place f(x) here + place g(x) here

Answer 13

it should look like
\[2x^2+3x+x-2 \]
now we combine like terms only for the x portion
so what's 3x+x ?

Answer 14

4x

Answer 15

\[2x^2+4x-2\] ok
so now we evaluate this function when x = 2. so place x =2 inside of the x of that function
ex.
\[2(2)^2+4(2)-2\]

Answer 16

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

Answer 17

23?

Answer 18

no......

Answer 19

what's (2)^2
since we have second power it means to write 2 two times
(2)^2 -> (2)(2)
what's (2)(2)?

Answer 20

(2)(2) notation is the same as 2 x 2 notation

Answer 21

i mean 14?

Answer 22

\[2(2)^2+4(2)-2 \]
\[2(4)+4(2)-2 \rightarrow 8+8-2 \rightarrow 16-2=14\]

Answer 23

yes it's 14

Answer 24

thx srry im very slow @learning