HP 48gII Graphing, 50g Graphing EXPAND, EXPANDMOD

Flags:	Numerical Results (–3), Exact Mode (–105)
Input/Output:
		Level 1/Argument 1		Level 1/Item 1
		x	→	x
		'symb1'	→	'symb2'
		(x, y)	→	(x, y)
	'A^(B+C)'
Example 1:		EXPAN returns 'A^C*A^B'
Example 2:	'(X+Y)^2' EXPAN returns 'X^2+2*Y*X+Y^2'
See also:	COLCT, EXPAND, ISOL, QUAD, SHOW
EXPAND
Type:	Command
Description:	Expands and simplifies an algebraic expression. This command is similar to the EXPAN
	command (which is included to ensure backward-compatibility with the HP 48-series calculators),
	except that EXPAND does more a more in-depth analysis and often does a better job at
	simplifying an expression than EXPAN.
Access:	Algebra, …×or PALG
Input:	An expression, or an array of expressions.
Output:	The expanded and simplified expression or array of expressions.
Flags:	Exact mode must be set (flag –105 clear).
	Numeric mode must not be set (flag –3 clear).
	Radians mode must be set (flag –17 set).
Example:	Simplify the following expression:
	(x2 + 2x + 1)
	-------------------------------
	x + 1
Command:	EXPAND((X^2+2*X+1)/(X+1))
Result:	X+1
See also:	EXPAN
EXPANDMOD
Type:	Function
Description:	Expands and simplifies an algebraic expression, or an array of expressions, modulo the current
	modulus.
Access:	!ÞMODULO
Input:	An expression, or an array of expressions.
Output:	The expanded and simplified expression, or array of expressions, modulo the current modulus.
Flags:	Exact mode must be set (flag –105 clear).
	Numeric mode must not be set (flag –3 clear).
	Radians mode must be set (flag –17 set).

Example: Expand the following expression and give the result modulo 3:

(x + 3)(x + 4)

Command: EXPANDMOD((X+3)*(X+4))

Result: X^2+X

3-80 Full Command and Function Reference