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If f(x) = 3x^2 - 5, what is the value of f(f(2))?

 Mar 25, 2021
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Just plug in 2 for the first f(x).

 

f(2)= 3(2^2)-5

 

f(2)=3(4)-5

 

f(2)=12-5

 

f(2)=7

 

Then plug in 7 for the second f(x)

 

f(7)=3(7^2)-5

 

f(7)=3(49)-5

 

f(7)=147-5

 

f(7)=142

 

f(f(2)=142

 Mar 25, 2021

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