1. 9-25-17 AM2.3d To Graph Complex Numbers
Got ID?
AM2.3d To Graph Complex Numbers
Things you don’t ever want to see…

2. COMPLEX QUIZ ON THURSDAY, SEPT. 28TH
Active Learning Assignment?
Answers to “Powers of i” assignment”:
COMPLEX QUIZ ON THURSDAY, SEPT. 28TH
Worksheets

3. LESSON: To graph in the complex plane: For (a + bi), the x axis is the real part (a) and the y axis is the imaginary part (bi).
Graph:
7 + 8i bi
Graph:
-5 + 9i a
What are these?

4. What is the resultant vector?
Find the sum of 6 – 2i and - 4 – 3i, graph both the complex numbers and their resultant.
(Use the parallelogram rule) bi
(6 – 2i) + (-4 – 3i)
6 – 2i
+ -4 – 3i
= 2 – 5i
6 – 2i a
-4 – 3i
Algebraic representation
Graphical representation
2 – 5i
What is the resultant vector?

5. Find the sum of 5 + 2i and -6 + 4i, graph both the complex numbers and their resultant.
(Use the parallelogram rule) bi a
i + 4i
= i
-1 + 6i
How to graph just 3i?
(It’s really i)
-6 + 4i
How to graph just -4?
5 + 2i
(It’s really i)
How to graph just 4 – 3i ?
(It’s really 4 – (3 * )i
(Use the calculator!)
(How about 4 – 6.7i ?)

6. COMPLEX QUIZ ON THURSDAY, SEPT. 28TH
Active Learning Assignment:
H/O for AM2.3b #1 – 20, Col. 1, 2
(For 11 – 20, Give both the Algebraic and
Graphical representations and use the parallelogram rule)
COMPLEX QUIZ ON THURSDAY, SEPT. 28TH
WOW:
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