Answers

2016-06-21T22:28:12+08:00
 f(x)=x²-1......   if were going to find f(x)......

example:

find: f(3)

f(x)=x²-1
f(3)=3²-1
f(3)=9-1
f(3)=8

so,that is my example for you..,,

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