HP 33s Scientific manual 15-28Mathematics Programs, Flags Used

"  " " ! L " #$ L " #$ % "  L " -+.

" ! L

" #$ L

Program Lines: (In RPN mode)

 ! "  ! %  #$ %  !

Description

Displays complex roots if any.

Stores second real root.

Displays second real root.

Returns to calling routine.

Checksum and length: 96DA 30

Starts routine to display complex roots.

Stores the imaginary part of the first complex root. Displays the imaginary part of the first complex root. Displays the real part of the second complex root. Gets the imaginary part of the complex roots. Generates the imaginary part of the second complex root.

Stores the imaginary part of the second complex root. Displays the imaginary part of the second complex root.

Checksum and length: 748D 24

Flags Used:

Flag 0 is used to remember if the root is real or complex (that is, to remember the sign of d). If d is negative, then flag 0 is set. Flag 0 is tested later in the program to assure that both the real and imaginary parts are displayed if necessary.

Remarks:

The program accommodates polynomials of order 2, 3, 4, and 5. It does not check if the order you enter is valid.

The program requires that the constant term a0 is nonzero for these polynomials. (If a0 is 0, then 0 is a real root. Reduce the polynomial by one order by factoring out x.)

The order and the coefficients are not preserved by the program.

15–28Mathematics Programs