Matrices and Complex Numbers

Find B-A

• -3 1

  7 -1

• 4 0

  -6 1

• -4 0

  6 -1

• not possible because rows do not match columns

Perform the operations to solve.

• A

• B

• C

• D

What is the simplified form of (8 -3i)²?

• 73

• 16 - 6i

• 55 + 48i

• 55 - 48i

Dimensions?

• a

• b

• c

• d

What is the entry at f₄₂?

• 23

• -81

• -44

• 99

• -56

What is a₂₃

• 14

• 4

• 1

• 3

Multiply

• -20 15 -10

  -30 -5 0

• -20 15 -10

  30 -5 0

• 1 8 3

  11 4 5

• 20 -15 10

  -30 5 0

Add the matrices.

• 
• 
• 
• 

Multiply

• 
• 
• 
• 

How do you write a complex number?

• a-bi

• a+bi

• ai+b

• ai-b