Question

f(x) = 5x^2 - 4x
g(x) = -3x^2 - 8
Find: (f + g)(2)

Please helpp !!!!

Answer 1

substitute 2 in for x in both of those equations, then add the results together

Answer 2

actually no,

Answer 3

based off this notation, im not sure if they want you to substitute 2 in for the g function first. then take that result and add it to the f function

Answer 4

thats wat i dont get either, so substitute 2 for g first and the f and then mulitply by 2? @blurbendy

Answer 5

i just did that and i didnt get one of the choices for the answer, what i dont nderstand is what do i use to substitute for.

Answer 6

\[f.g(2)\]

Answer 7

i dont understand @telijahmed

Answer 8

what are your answer choices

Answer 9

-8 , -16 , 24 , 16

Answer 10

i would go with -8 then. if you substitute 2 in for both of the functions you get -8

5(2)^2 - 4(2)
= 5(4) - 8
= 12

-3(2)^2 - 8
= -3(4) - 8
= -20

12 + (-20) = -8

Answer 11

thank youu.

Answer 12

np