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anonymous

  • one year ago

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

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  1. jackellyn
    • one year ago
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    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.

  2. anonymous
    • one year ago
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    its f(x)=2^2+3x and g(x)=x-2 what is (f+g)(2) so what i got it would equal 22

  3. jackellyn
    • one year ago
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    f+g=2x^2+3x+(x-2) Simplify, then substitute the x with 2.

  4. anonymous
    • one year ago
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    i got 21

  5. UsukiDoll
    • one year ago
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    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)

  6. UsukiDoll
    • one year ago
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    then after obtaining f(x)+g(x) we combine like terms finally evaluate f(x)+g(x) when x = 2

  7. anonymous
    • one year ago
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    kinda confused still lol sorry

  8. UsukiDoll
    • one year ago
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    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

  9. anonymous
    • one year ago
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    okay

  10. UsukiDoll
    • one year ago
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    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

  11. anonymous
    • one year ago
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    okay

  12. UsukiDoll
    • one year ago
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    place f(x) here + place g(x) here

  13. UsukiDoll
    • one year ago
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    it should look like \[2x^2+3x+x-2 \] now we combine like terms only for the x portion so what's 3x+x ?

  14. anonymous
    • one year ago
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    4x

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

  16. Zale101
    • one year ago
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    (f+g)(2)=f(2)+g(2)

  17. anonymous
    • one year ago
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    23?

  18. UsukiDoll
    • one year ago
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    no......

  19. UsukiDoll
    • one year ago
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    what's (2)^2 since we have second power it means to write 2 two times (2)^2 -> (2)(2) what's (2)(2)?

  20. UsukiDoll
    • one year ago
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    (2)(2) notation is the same as 2 x 2 notation

  21. anonymous
    • one year ago
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    i mean 14?

  22. UsukiDoll
    • one year ago
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    \[2(2)^2+4(2)-2 \] \[2(4)+4(2)-2 \rightarrow 8+8-2 \rightarrow 16-2=14\]

  23. UsukiDoll
    • one year ago
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    yes it's 14

  24. anonymous
    • one year ago
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    thx srry im very slow @learning

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