Radicals and Complex numbers

Simplify the radical - 6√90

• 10√8
• 10√18
• 18√10
• 18√9

Simplify

• √5
• -3√6
• √6
• 6

Tags

CCSS.HSN.RN.A.2

• None of these

x² = 16

• ± 4
• ± 8
• 4
• 8

Tags

CCSS.8.EE.A.2

2k² - 37 = 61

• -98 and 98
• -49 and 49
• -7 and 7
• 7

Tags

CCSS.8.EE.A.2

Simplify: 
(7 + 2i)(9 - 6i)

• 75-24i
• 63 - 24i  - 12i²
• 51 - 24i
• 58 + 60i

Tags

CCSS.HSN.CN.A.2

What does i² = ?

• -1
• √-1
• 1
• -√1

Tags

CCSS.HSN.CN.A.1

Simplify 
√-25

• -5i
• 5
• 5i
• -5

Simplify:
√-108

• 3i√6
• 3i√20
• 6i√3
• 20i√3