You can type algebra expressions, equations and values into
Algematics exactly as they appear in your text book or study notes. This topic
explains the easy formula language that makes this possible.
enter data (equations or inequalities or expressions) into Algematics:
1. you start at the Algematics
main window, then
2. press the F3
key. (Or the toolbar
button.) to display the data entry dialog box:
You type your equations and expressions into
the lower edit box, while the upper edit box is for comments, headings or other
are the rules for typing numbers, equations and expressions into the lower edit
The range of integer values allowed is from -18446744073709551615 to
To enter a fraction, type two numbers as a ratio, with a colon :
character between them. For
example, 3:4 for three quarters, 5:8 for five eighths. The numbers in the ratio cannot be outside of the
range for integers.
When you enter decimal numbers, they are represented internally as ratios. If
converting the decimal to a ratio results in numbers outside of the integer
range, then an error will occur and you will not be able to enter the decimal
number. You can correct the error by using less decimal places.
All lower case: 'a'
and upper case 'A'
letters are allowed as variables.
The question mark: '?'
can also be used as a variable.Â
To make Greek letters, like p,
etc., put a single quote character immediately before the letter. eg:
'fÂ Â gives
Only 'round' brackets: '('
can be used as brackets in Algematics.
(Square brackets are used for powers as described below.)
Type the index of powers in square brackets, eg x
Any type of roots or surds may be entered by using the power notation described
above with a fraction for the index. For example, to enter the square root of x,
Roots can be displayed as either a power or with a root sign.
To enter rational expressions, you must be very careful to make sure that the
denominator is constructed properly.
For example, to enter the rational expression:
of these expressions mean that the factors 'a',
are divided by all of the others: 'd',
You will usually use the first method:
Algematics will create expressions that look like the third:
be wrong, because only 'd'
is in the denominator. ( What it really means is: abcef
equations as two expressions with anÂ =
symbol between them. Only one =
symbol is allowed per equation.
+ b + c = d + e + f
are entered in the same way as equations, but special symbols are used instead
of the equal sign:
> ' for 'greater than'
' < ' for 'less than'
' >= ' for 'greater than or equal to'Â
(Enter a ' >
' character, then an ' =
' <= ' for 'less than or equal to' (Enter
a ' <
' character, then an ' =
'<> ' for 'not equal to' (Enter
a ' <
' character, then a ' >
' ,Â ' <=
'Â and ' <>
' ,will display properly on the screen as 'greater than
or equal to' ,Â 'less than or equal
to' , and 'not equal to' symbols respectively.
short cut buttons in the
data entry dialog box simplify entry of
complicated expressions with powers, roots, brackets and quotients.Â
example, to make a rational expression in the 'maths box', use the
there is no text selected in the 'maths
box', then click
to insert: '( )/( )' at the cursor position. Now you
can type the numerator and denominator in the brackets.
there is text selected, then
to make the selected text the numerator and you can now type in the denominator.
you want to divide:Â 2x
+ 3x + 4Â
Â 2x + 3x
+ 4 in the 'maths box', then click
do this, select
+ 3x + 4)/(
will now have:
simply type the denominator in the right hand brackets:
+ 3x + 4)/(3x