5.9 Complex Numbers

Simplify the following radical: √32

• 3√2
• 4√8
• 16√2
• 4√2

Simplify √-28

• -√28
• -2i√7
• 2i√7
• 28i

Simplify √-23

• -√23
• 23i
• 23
• i√23

√-36

• 6
• -6
• -6i
• 6i

Simplify: 
(10+ 15i) - (48 - 30i)

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

Tags

CCSS.HSN.CN.A.2

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

• -2+6i
• 12+6i
• -35-16i²
• -35 -16i

Tags

CCSS.HSN.CN.A.2

Simplify: 
(10+ 15i) - (48 - 30i)

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

Tags

CCSS.HSN.CN.A.2

Simplify:
-3i(4 + 2i)

• 6 - 12i
• 6 + 12i
• -12i - 6i²
• -12i + 6i²

Tags

CCSS.HSN.CN.A.2

Simplify:
(2 - 3i)(5 + 4i)

• 22 - 7i
• 22 + 7i
• 22 - 7i²
• 22 + 7i²

Tags

CCSS.HSN.CN.A.2

(4-5i)(4+5i)

• 41
• -9
• 41+40i
• -9+40i

Tags

CCSS.HSN.CN.C.8