Quiz #12 Imaginary and Complex Numbers

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CCSS.HSN.CN.A.1

What does i² = ?

• -1

• $\sqrt{-1}$

• 1

• $-\sqrt{1}$

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CCSS.HSN.CN.A.1

i¹²⁹

• -i
• i
• 1
• -1

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CCSS.HSN.CN.A.2

i⁶⁶

• 1
• i
• -1
• -i

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CCSS.HSN.CN.A.2

Simplify √-112

• 4i√7

• -2i√7

• 16i√7

• -4i√7

Simplify:  $\sqrt{-100}$  

• 10i

• -10i

• 10

• -10

Simplify  $2\sqrt{-32}$  

•  $2i\sqrt{32}$  

•  $4i\sqrt{2}$  

•  $8i\sqrt{2}$  

•  $-16i\sqrt{2}$  

Evaluate:

-7i - 7 + 5i

• -7 - 12i

• 7 - 2i

• -7 + 12i

• -7 - 2i

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CCSS.HSN.CN.A.2

Evaluate:

-12i + 7i

• 19i

• -19i

• 5i

• -5i

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CCSS.HSN.CN.A.2

Two complex numbers are added. How do we do this?

• We add up all 4 numbers you see.

• We add up all the big numbers.

• We add only the real parts. Because we cannot see the imaginary parts.

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CCSS.7.NS.A.1C