HP 15c Scientific manual Z 8 Y 7 X Keys

Section 11: Calculating With Complex Numbers 123

Re Im

T9 Z 8 Y 7 X 6

Keys: 2

Re Im	Re Im
8	7
7	6

6	2
2	2
	v 3

Re	Im	Re	Im
7		7	0
6		7	0
2		6	0
3		2	3
	´V

The execution of ´ V causes the entire stack to drop, the T contents to duplicate, and the real X contents to move to the imaginary X-register.

When the second complex number is entered, the stacks operate as shown below. Note that vlifts both stacks.

Re Im Re Im Re Im Re Im

T

Z

Y

X Keys:

7	0
7	0

60

23

4

Re Im

7	0	6		0
6	0	2		3
2	3	4		0
4	0	4		0
	v		5
	Re Im				Re

6	0
2	3

40

50

Im

T

Z

Y

X

Keys:

6	0	6	0
2	3	6	0
4	0	2	3
5	0	4	5
	´V		+

6	0
6	0

60

68

A second method of entering complex numbers is to enter the imaginary part first, then use } and −. This method is illustrated under Entering Complex Numbers With −, page 127.