Introduction to Complex Numbers

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• 3+5i

• -5i

• -5

• 5

• 4i

What letter usually represent imaginary number?

• a
• i
• j
• x

Simplify

• -4 - i
• -4 + i
• -4
• i - 4

How do you write a complex number?

• a-bi

• a+bi

• ai+b

• ai-b

Simplify:
3√-81

• -27
• 3i√3
• 27i
• 9i

Simplify 4√75

• 4√5
• 12√5
• 20√3
• 7√3