Precalculus Functions and Graphs
Basic Definitions and Notations
   Interactive Example 1

Example 1. f(x) = 2 · x2 - 3 · x + 1;
find   f(a).
Example 2. f(x) = 2 · x2 - 3 · x + 1;
find   f(b · x + c).

a   

b   
c   
Solution
Substituting the input,  
f(  ) = 2 ·   2 - 3 ·   + 1
  =  
  =  
Solution
Substituting the input,  
f(  ) = 2 · (  ) 2 - 3 · (  ) + 1
Squaring  
  =  
Simplifying
  =  


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