z = 2 + 3i
w = -1 + 2i
Ex. 17: w ÷ u
y=1-i
x = -2 - 4i
u=7+i
Ex. 18: x ÷ y
1
z = 2 + 3i
w = -1 + 2i
y=1-i
To graph complex numbers we
need to think of the axes a little
differently than what we have
before.
The x-axis becomes the "real"
portion or "a" and the y-axis
become the "imaginary" portion or
"b".
x = -2 - 4i
u=7+i
IMAGAINARY
AXIS
REAL
AXIS
Complex number is in the form of
a + bi
2
We can also take the absolute value of a complex number.
Ex. 19:
3 - 4i
Ex. 20:
-2 + 5i
3
Ho
m
ew
or
k
Chapter 5--Section 9
Operations with Complex Numbers
386
Problems: 36, 38-40, 43, 46-49, 55-58,
62-65, 73-76, 78-79, 105-107
4