anonymous
  • anonymous
f(x) = 5x − 7 g(x) = 3 − x^2 find (g o f)(x)
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
how is it possible to substitute x for f(x)?
Mertsj
  • Mertsj
\[g(f(x))=3-(5x-7)^2=3-(25x^2-70x+49)=-25x^2+70x-46\]
Mertsj
  • Mertsj
g composite f means replace every x in the function g with the f(x)

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anonymous
  • anonymous
ohh, okay i understand now. i plugging the original equation into f(x)
Mertsj
  • Mertsj
Good for you.
anonymous
  • anonymous
i dont know if you are still here.. but where did the 70x come from?
Mertsj
  • Mertsj
square 5x-7
anonymous
  • anonymous
oh okay i need to do (5x-7)(5x-7)
Mertsj
  • Mertsj
|dw:1333236986702:dw|
anonymous
  • anonymous
good ol' FOIL... i initiall just squared 25 and 7 lol..im on the stupid pill today.. THANK you again
Mertsj
  • Mertsj
yw

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