128 Section 11: Calculating With Complex Numbers
Re Im Re Im Re Im Re Im
T
a b
a b
a b
a b
Z
c d
c d
c d
c d
Y
e f
e f
e f
e f
X
7 8 0 8 9 8 17
144
Keys:
−
9
|
x
Entering a Real Number
You have already seen two ways of entering a complex number. There is
a shorter way to enter a real number: simply key it (or recall it) into the
display just as you would if the calculator were not in Complex mode. As
you do so, a zero will be placed in the imaginary X-register (as long as the
previous operation was not − or `, as explained on page 124).
The operation of the real and imaginary stacks during this process is
illustrated below. (Assume the last key pressed was not − or ` and
the contents remain from the previous example.)
Re Im Re Im Re Im
T
a b
c d
e f
Z
c d
e f
17
144
Y
e f
17
144
4 0
X
17
144
4 0 4 0
Keys:
4
v
another number.)
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