a...z and A...Z

:

characters are used as variable names. Note that in order to enter the natural logarithm base e and the complex unit i, you need to use the special character toolbar.

0...9

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standard digit meaning.

.

:

decimal point.

+, -, *, /, ^

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these are common operations. Note that ‘/’ is a fraction operator. If you need the division operator you will need to use the special character toolbar.

Also note that the multiplication operator ‘*’ will sometimes be displayed as a dot and at other times it will not be displayed at all . This is a matter of formatting; even when there is no dot, the multiplication operation is implied.

=, < , >

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equality and inequality symbols (which are also available in the special character toolbar: and ).

(less than or equal to) and (greater than or equal to) are available only on the special character toolbar.

{, [, (, ), ], }

:

standard parentheses meaning. Note there is no difference in function between the different sets of parentheses – they are made available only to better comply with the formatting in your book. However, once you use a particular open parentheses (i.e. ‘[‘) you have to close the expression with the same type of parentheses (i.e. ‘]’). In fact, if you type any of these left parentheses, Algebrator will add the corresponding right parenthesis for you.

|

:

absolute value symbol.

:

the <ENTER> key is used when you want to enter multiple equations or expressions before starting to solve the problem. For example, when you are trying to calculate the LCM of two expressions or solve a system of two equations.