126 Section 11: Calculating With Complex Numbers

Clearing the Imaginary X-Register.To clear the number in the imaginary X-register, press ´}, then press −. Press ´}again to return the zero, or any new number keyed in, to the imaginary X-register.

Example: Replace -1 -8iby -1 + 5i.

 

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X

-1

-8

 

-8

-1

 

0

-1

 

5

-1

 

-1

5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Keys: } − 5}

(continue with any operation)

Clearing the Real and Imaginary X-Registers. If you want to clear or replace both the real and imaginary parts of the number in the X-register, simply press −, which will disable the stack, and enter your new number. (Enter zeros if you want the X-register to contain zeros.) Alternatively, if the new number will be purely real (including 0 + 0i), you can quickly clear or replace the old, complex number by pressing ) followed by zero or the new, real number.

Example: Replace -1 + 5i with 4 + 7i.

 

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X

-1

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4

 

 

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Keys: − 4 v 7´V

(continue with any operation)