Multiplying and Simplifying Imaginary Numbers

What is the conjugate you would multiply by?

• 2+i

• 2-i

• -2+i

• -2-i

• A
• B
• C
• D

What is the numerator after multiplying and before simplifying?

• 6-8i

• 12-6i

• 8+6i

• -3+4i

• 10
• -10
• 10i
• -10i

√-108

• 3i√6

• 3i√20

• 6i√3

• 20i√3

Simplify:
3√-81

• -27

• 3i√3

• 27i

• 9i

Simplify

• 
• 
• 
• 

Simplify

• 
• 
• 
• 

• A
• B
• C
• D

What is the conjugate you would multiply by?

• 5+2i

• 5-2i

• -5-2i

• -5+2i