Introducing the Number i

What does i² =  ?

• 1
• -1
• √-1
• √1

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CCSS.HSN.CN.A.1

Simplify √-4

• ± 2i

• ± 2

• ± 4

• ± 4i

Simplify.

• ± 25i

• ± 25

• ± 5i

• ± 5

Simplify √-81

• ± √81

• ±√81i

• ± 9i

• ± 81i

Simplify

• ± 6
• ± 6i
• ± √6i
• ± √6

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CCSS.HSN.CN.A.1

CCSS.HSN.CN.A.2

Simplify

• ± 10i
• ± 10
• ± √10i
• ± √10

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CCSS.HSN.CN.A.1

CCSS.HSN.CN.A.2

CCSS.HSN.RN.A.2

Which of the following are complex numbers?

• -3

• 5i

• 3+4i

• 0

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CCSS.HSN.CN.A.1

Which of the following are real numbers?

• 2i

• 1-i

• 3

• 0+2i

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CCSS.HSN.CN.A.1

Which of the following are imaginary numbers?

• 0

• $\sqrt{-1}$

• -i

• 4-2i

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CCSS.HSN.CN.A.1

Simplify:  $i^{15}$  

• i

• -1

• -i

• 1

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CCSS.HSN.CN.A.1

CCSS.HSN.CN.A.2