Adding and Subtracting and Multiplying Complex Numbers

Add/Subtract using the proper rules:
2i + 3 + 7 - 12 i

• 10i - 10
• -10i + 10
• 14i + 10
• -10i + 4

Add/Subtract using the proper rules:
(7 + 2i) - (-12 - 4i)

• -5 - 2i
• 19 - 2i
• -5 + 6i
• 19 + 6i

Add/Subtract using the proper rules:
-3i + 2 - 4i + 16 - (4 - 8i)

• -15i + 22
• i + 14
• -i + 14
• 15i - 22

Multiply:
2i (-3i + 7)

• 6 + 14i
• -6i² + 14i
• -6 + 14i
• 20i²

Multiply:
(2i + 4) (7i - 3)

• 27i - 26
• -14 + 15i - 12
• 15i + 2
• 22i - 26

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

• 74
• 75
• 74-1

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

• 22-i
• 16-i
• 17-i

Simplify: 
(10+ 15i) - (48 - 30i)

• 58 - 45i
• 58 - 15i
• -38 - 15i
• -38 + 45i

Simplify
3i - (4 + 7i)

• -4 + 10i
• 21 - 12i
• 4 - 10i
• -4 - 4i

Find the sum.
(5-2i) + (-7+8i)

• -2+6i
• 12+6i
• -35-16i²
• -35 -16i