HP 40gs hp 40gs_user's guide_English_E_HDPMSG40E07A.pdf - Page 266

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. 15-14 Equation Writer