*The Museum of HP Calculators*

#
Quadratic Equation for the 42S

This program is Copyright © 2002 by
Pascal Fellerich and is used here
by permission. This program is based on the Quadratic Equation program in
the 41C library.

This program is supplied without representation or warranty of any kind.
Pascal Fellerich and The Museum of HP Calculators therefore assume no
responsibility and shall have no liability, consequential or otherwise, of
any kind arising from the use of this program material or any part thereof.

##
Overview

This program works with complex numbers and roots as well. To solve the equation
ax^2+bx+c=0, type <a> ENTER <b> ENTER <c> XEQ QUAD. The
two roots are returned on the stack in x and y.

##
Program

00 { 29-Byte Prgm }
01 LBL "QUAD"
02 RCL ST Z
03 +/-
04 STO: ST Z
05 :
06 X<>Y
07 2
08 :
09 STO ST Z
10 STO ST T
11 X^2
12 +
13 SQRT
14 STO- ST Z
15 +
16 RTN

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