Test on Complex Numbers

i(2+5i)

• -5+2i
• 5-2i
• 7i
• 2i+5i

(2+3i)(4-2i)

• 14+8i
• 48+16i
• 12-8i
• 2-8i

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

Simplify √-4

• 2i
• -2i
• 2
• 4i

Simplify √-81

• -√81
• -9i
• 9i
• 81i

Simplify √-28

• -√28
• -2i√7
• 2i√7
• 28i

• A
• B
• C
• D

(1-3i)(2+5i)

• 22-i
• 16-i
• 17-i

-2/(5-i)

• (-10-2i)/26
• -2i
• -5-i
• (-5-i)/13