###### Example B.42

Evaluate \(f (x) = x^2 + 6x + 9\) for \(x = 3\text{.}\)

Set \(Y_1 = X^2 + 6X + 9\text{,}\) and quit (

`2nd`

`MODE`

) to the Home screen.-
To evaluate this function for \(X = 3\text{,}\) press

`VARS`

\(\boxed{\rightarrow}\)`ENTER`

`ENTER`

`(`

\(3\)`)`

`ENTER`

See Figure B.43.