2.5 Complex Numbers

2.5 Imaginary and Complex Numbers

Unit 2: Quadratic and Absolute Value Functions

Remember to title and date your notes.​

​1. Vocabulary

Multiple Choice

Simplify √-4

• 2i
• -2i
• 2
• 4i

Multiple Choice

Simplify √-23

• -√23
• 23i
• 23
• i√23

​1. Vocabulary

2. Complex Numbers- what happens when you add real and complex numbers.

• drop ()

• add real #s

• add imaginary #s

• do NOT add real #s and imaginary #s

• distribute - sign

• same as addition

Fill in the Blanks

Type the complete answer.

Fill in the Blanks

Type the complete answer.

Multiple Choice

(3 + 2i) + (4 - 5i)

• 7 + 7i

• 1 - 3i

• 1 - 7i

• 7 - 3i

Multiple Choice

(4 - 2i) - (3 + 6i)

• 7 - 4i

• 1 + 4i

• 1 - 8i

• 7 - 8i

Multiple Choice

(2i)(3i)

• 5i
• -5
• 6i
• -6