HP 39gs Master Guide

Example 2: Simplifying surds
Simplify the surd expression:
218 − 72 + 75
i. Begin by entering the expression:
2 SHIFT 18 SHIFT SHIFT 72
SHIFT 75
ii. Now simplify each surd in turn
(assuming working is desired):
ENTER
ENTER
ENTER
and press
ENTER to simplify:
iii. Finally, select the entire expression with SHIFT
iv. If you want the result as a decimal, press
NUM. Pressing SHIFT
NUM
will cause the calculator to analyze the decimal and re-instate
the surd.
342

HP 39gs Specifications

General

Type	Scientific
Form factor	Pocket
Product color	Gray
Internal memory	0.256 MB

Weight and Dimensions

Weight	249 g
Dimensions (WxDxH)	187 x 94 x 31 mm