Learning Resources

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Lesson

As its name suggests, this Focus is designed for you to discover how to add and subtract complex numbers. This process will be illustrated graphically using vectors.

Hints are provided for each step of the Focus. Use them only if you are experiencing difficulty. Complete each step of the Focus, carefully following all instructions.

• Step A
• Step B
• Step C
• Step D
• Step E
• Step F

An example is provided below.

Activity

Focus Questions page 281 #'s 32 - 39

C.Y.U. pages 281 - 283 #'s 40 - 48

When you have completed these questions, ask your on-site teacher to get the solutions for you from the Teacher's Resource Binder and check them against your answers. After you do this, if there is something you had trouble with and still do not understand, contact your on-line teacher for help.

Test Yourself

1. What is the complex conjugate of -3 + 7i ?
2. Simplify .
3. Given that z = 3 - 10i, find the value of .
4. Calculate the modulus of -3 - 11i.
5. Simplify .

Solutions

1. -3 - 7i
   
2. 
3. 
4. 
5.