HP 49g Graphing Calculator - Manual (Page 147)

See also:
If complex mode is set (flag -103 set), FROOTS looks
for complex solutions as well as real solutions.
If approximate mode is set (flag -105 set) FROOTS
searches for niuneric roots.
FCOEF
FXND
Type: Command
Description: Splits an object iirto a numerator and a denominator.
Access: Catalog, (C@
Input: A fraction, or an object that evaluates to a fraction.
Output: The object split into numerator and denominator.
Level 2/Item 1: The niunerator.
Level 1/Item 2: The denominator.
Flags: Exact mode must be set (flag -105 clear).
Numeric mode must not be set (flag -03 clear).
Example: Return the niunerator and the denominator of the
following expression:
( A - - 3 ) -
z + 4
Command:
F X N D ( ( X - 3 )
^ 2 / ( Z + 4 )
)
Result:
Level 2/Iteml: (X - 3 ) ^ 2
Level 1/Item 2: z + 4
GAUSS
Type: Command
Description: Returns the diagonal representation of a quadratic fonn.
Access: Matrices. ROlllCES) quadratic form
Input: Level 2/Argument 1: The quadratic form.
Level 1/Argument 2: A vector containing the
independent variables.
Output: Level 4/Ai'gument 1: An array of the coefficients of the
diagonal.
Level 3/Argument 2: A matrix, P, such that the quadratic
form is represented as P'^DP, where the diagonal matrix
Page 14-24 Computer Algebra Commands