Operations of Complex Numbers

Simplify.

• -5i
• 5
• 5i
• -5

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CCSS.HSN.CN.A.1

CCSS.HSN.CN.A.2

CCSS.HSN.RN.A.1

CCSS.HSN.RN.A.2

Simplify the following expression:

• 
• 
• 
• 

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CCSS.HSN.CN.A.1

CCSS.HSN.CN.A.2

CCSS.HSN.RN.A.1

CCSS.HSN.RN.A.2

i² equals...

• 1

• -1

• -i

• 0

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CCSS.HSN.CN.A.1

CCSS.HSN.CN.A.2

 $i^{127}$  simplifies to...

• 1

• -1

• -i

• i

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CCSS.HSN.CN.A.1

CCSS.HSN.CN.A.2

Simplify. Write your answer in the form $a+bi$  .

 $\left(5-3i\right)\left(-2+4i\right)$  

•  $2+26i$  

•  $3+i$  

•  $-10-12i^2$  

•  $-22+14i$  

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CCSS.HSN.CN.A.1

CCSS.HSN.CN.A.2

Simplify

• 9i/5
• 2i
• 8i/5
• 13i/5

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CCSS.HSN.CN.A.2

CCSS.HSN.CN.A.3

The complex conjugate of 4 + 3i is

• 3 + 4i

• 3 - 4i

• 4 - 3i

• 4 + 3i

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CCSS.HSN.CN.A.3

Multiply the complex conjugates (4 - 3i)(4 + 3i)=

• 7

• 14

• 25

• 2

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CCSS.HSN.CN.A.2

What is the conjugate you would multiply by?

• 5+2i

• 5-2i

• -5-2i

• -5+2i

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CCSS.HSN.CN.A.3

Simplify

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CCSS.HSN.CN.A.1

CCSS.HSN.CN.A.2