hp40g+.book Page 14 Friday, December 9, 2005 1:03 AM

First option: function first, then arguments

In the Equation Writer, press

, select FACTOR and

then press or . FACTOR() is displayed in the Equation Writer, with the cursor between the

parentheses (as shown at the right).

Enter your expression, using the rules of selection described earlier.

2 4

The entire expression is now selected.

Press then produce the result.

With a blank Equation

Writer screen, press , select SUBST and then press or .

With the cursor between the

parentheses at the location of the first argument, type your expression.

Note that SUBST has two arguments. When you have finished entering the first argument (the expression), press to move to the second argument.

Now enter the second argument, x=4.

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Equation Writer