HP -20S Owner's Manual page 97

Example 1: Calculate (2 + 3i) — (6 + 4i):
Keys: Display: Description:
(7] (=] CPL Loads program.
C 00-
() Exits Program mode.
2 3 3_ Enters first complex
number.
B 3.0000 Complex subtract.
6 4 4_ Enters second complex
number.
R/S —1.0000 Calculates difference.
Displays imaginary
part.
Y —4.0000 Displays real part.
Using the result of the previous example, calculate ((2 + 3i) —
(6 + 41)/(1 — i):
(=] —1.0000 Restores original order
of result.
D —1.0000 Complex divide. It is
P
not necessary to re-
enter the result of the
previous calculation.
1 [INPUT] 1 -1_ Enters divisor.
R/S —2.5000 Calculates quotient.
Displays imaginary
part.
(] —1.5000 Displays real part.
7: Built-in Program Library 95