SOLUTION: f(x)=81-x^2

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Question 853050: f(x)=81-x^2
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

f(x)=81-x^2

f(x)=(9 - x)(9 + x)

Use FOIL to check factoring

F	First terms

O	Outside terms

I	Inside terms

L	Last terms