Concepts in Complex Numbers

√-4

• -2
• -2i
• 2
• 2i

√-36

• 6
• -6
• -6i
• 6i

√-81

• 9i
• -9i
• -9
• 9

√-9

• -3i
• 3
• 3i
• -3

(5-2i)  (-7+8i)

• -19+54i
• 12+6i
• -35-16i²
• -35 -16i

(10+3i) (2-9i)

• 20-27i
• 12+7i
• 47-84i
• 20-27i²

3i + 2i

• 5i
• 5i²
• 6i
• -5

Choose the correct answer for the operation pictured.

• 7-13i
• 7-i
• 1-13i
• 1-i

(5-2i) + (-7+8i)

• -2+6i
• 12+6i
• -35-16i²
• -35 -16i

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

• 28-24i
• -3-3i
• 18-10i
• 15-7i