Multiplying Pure Imaginary Numbers

Multiply
3i(-2 + 4i)

• -6+12i
• -12-6i
• -2+7i
• 12+6i

(-3-i)(6-i)

• -21-7i
• -19-3i
• -15-5i
• -17-9i

(3+8i)(-2-i)

• 2-19i
• 23-i
• 34+5i
• 23-i

The expression (2 + 3i)² is equal to

• -5

• -5 + 12i

• 14

• 13 + 12i

(7 - 5i)(7 + 5i)

• 74
• 24
• 49 - 25i
• 49 + 25i

Simplify completely: (-4i)(3i)(4i)

Hint: i³ can be simplified

• 24

• -48i

• 48i

• 60

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

• -2+6i

• 12+6i

• -35-16i²

• -35 -16i

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

• -3 + 7i

• -3 - 7i

• 3 - 3i

• 9 - 7i

(-5 - 5i)(1 + 5i)

• 30 - 20i

• -5 - 25i²

• -5 - 55i

• 20 - 30i

Simplify completely: (-2i)(5i)(-4i)

Hint: i³ can be simplified

• -40i

• -40i³

• 40i

• -i