Complex #s and Powers of I Review

What does i² = ?

• -1
• √-1
• 1
• -√1

What does i³ = ?

• -i

• √-1
• i

• -√1

Simplify 
√-25

• -5i
• 5
• 5i
• -5

• True

• False

What does i⁴ = ?

• -1
• √-1
• 1
• -√1

i⁷

• i
• -i
• 1
• -1

i⁵²

• i
• -i
• 1
• -1

Simplify:
√-108

• 3i√6
• 3i√20
• 6i√3
• 20i√3

i⁶⁶

• 1
• i
• -1
• -i

How do you write a complex number?

• a-bi

• a+bi

• ai+b

• ai-b