Re: HP 17bii+ solver equation question Message #5 Posted by bill platt on 18 Feb 2007, 12:02 a.m., in response to message #1 by Don Shepherd
There is no use for the "change sign" command in an equation. You aren't "changing" anything when you are writing an equation. Rather, you are laying down a string of characters that are interpreted based on context. Therefore the minus sign and the plus sign are all you needjust as is the case when writing with a pencil.
For example:
23^2 is evaluated as 2 minus (3^2)
23^2 is evaluated as 2 plus (3^2)
23^2 is evaluated as 2 minus (3^2)
and
2+(3^2) is also evaluated as 2 minus (3^2)
If you want to do:
(3)^2
You have to do just that!
If you need to change anything, you have the cursor positioning aroows, and the < delete key.
I hope that helps!
