Conjugate, Modulus And Argument; Solving Equations With Complex Roots - Casio fx-9860GII Instructions Manual

1.10 Conjugate, modulus and argument

Example 13
= +
Let z 1 3 i
z ∗
Find i ii |z| iii
Press MENU . You will see the dialog box as shown on the right.
Choose 1: RUN·MAT and press
OPTN F3
i Press | CPLX |
Enter the complex number in brackets. To enter the imaginary number
i.
symbol i press F1
Press EXE
OPTN F3
ii Press | CPLX |
Enter the complex number. To enter the imaginary number symbol i
i.
press F1
Press EXE
Press OPTN | F3 CPLX |
iii
Enter the complex number in brackets.
To enter the imaginary number symbol i press
Press EXE

1.11 Solving equations with complex roots

Example 14
3
Solve the equation 2x − 15x
Press MENU . You will see the dialog box as shown on the right.
Choose A: EQUA and press
SHIF T
Press SET UP
Select a + bi as the Complex mode
EXIT
Press
© Oxford University Press 2012: this may be reproduced for class use solely for the purchaser's institute
arg (z)
EXE .
F4
Conj
F2
Abs
F3 Arg
2
+ 44x − 39 = 0
EXE
.
i.
F1
Casio fx-9860GII
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