Perform Operations with Pure Imaginary Numbers

Which of the following is equivalent to (5-3i)+(-6+2i)?

• -1-5i

• -1-i

• 11-i

• -30-6i

Which of the following is equivalent to (3-5i)-(6+2i)

• -3-7i

• -3-3i

• 3-3i

• 9-7i

What letter usually represent imaginary number?

• a

• i

• j

• x

Simplify √-4

• 2i

• -2i

• 2

• 4i

Simplify -√-8

• -i√8

• -2i√2

• 2i√2

• -8i

What does i² =  ?

• 1

• -1

• √-1

• √1

Calculate:
-4 (13 + 5i) 

• -52 − 20i

• 9 + i

• 17 − 20i

• -52 + 20i

6i (-5 + 10i)

• -30i + 60i²

• 30i − 16i²

• 11i + 60i²

• -11i²+ 16i

Calculate (multiply):
(1 − 2i)(6 + 5i)

• 16 − 7i

• -16 + 7i

• -16 − 7i

• 16 + 7i

Simplify: 
(10+ 15i)-(48 - 30i)

• 58 - 45i

• 58 - 15i

• -38 - 15i

• -38 + 45i