anonymous
  • anonymous
Help me .
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
lol
anonymous
  • anonymous
if \[f(x)=x ^{2} \] and \[g(x)=x+4\] find: A) ( fog ) (x) B) (fog) (2)
anonymous
  • anonymous
@math>philosophy shut up lol

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More answers

anonymous
  • anonymous
do you know how to evaluate composite functions
anonymous
  • anonymous
no
anonymous
  • anonymous
take the function g(x) and put it into the variable for f(x) so f(x) = (x+4)^2 right
anonymous
  • anonymous
yeah .. lol
anonymous
  • anonymous
so just plug in whatever you want to
anonymous
  • anonymous
@jim_thompson5910
anonymous
  • anonymous
No
anonymous
  • anonymous
yes
anonymous
  • anonymous
NO
anonymous
  • anonymous
yes
anonymous
  • anonymous
okay .
anonymous
  • anonymous
good
anonymous
  • anonymous
Shut up
jim_thompson5910
  • jim_thompson5910
f(x)=x^2 f(g(x))=(g(x))^2 f(g(x))=(x+4)^2 (f o g)(x)=(x+4)^2
jim_thompson5910
  • jim_thompson5910
optionally, you can expand (x+4)^2 to get x^2 + 8x + 16, but again, it's optional in my view
jim_thompson5910
  • jim_thompson5910
to find (fog) (2), you plug x = 2 into (f o g)(x)=(x+4)^2 to get (f o g)(x)=(x+4)^2 (f o g)(2)=(2+4)^2 I'll let you finish
anonymous
  • anonymous
(fog)(2)= (6)^2
jim_thompson5910
  • jim_thompson5910
keep going
anonymous
  • anonymous
(fog)(2)= 12?
anonymous
  • anonymous
36*
jim_thompson5910
  • jim_thompson5910
36, yes
anonymous
  • anonymous
so the answer is fog(2)=36?
jim_thompson5910
  • jim_thompson5910
yep
anonymous
  • anonymous
Thank you(:
jim_thompson5910
  • jim_thompson5910
yw

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