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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