Complex Numbers (Add & Subtract)

Add/Subtract using the proper rules:
(7 + 2i) - (-12 - 4i)

• -5 - 2i
• 19 - 2i
• -5 + 6i
• 19 + 6i

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Add/Subtract using the proper rules:
2i + 3 + 7 - 12 i

• 10i - 10
• -10i + 10
• 14i + 10
• -10i + 4

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(5-2i) + (-7+8i)

• -2+6i
• 12+6i
• -35-16i²
• -35 -16i

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Simplify.

• -5i
• 5
• 5i
• -5

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Another way to express √-1 is?

• 1

• -1

• i

• 0

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CCSS.HSN.CN.A.1

What does i² =  ?

• 1
• -1
• √-1
• √1

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CCSS.HSN.CN.A.1

Simplify: 
(10+ 15i) - (48 - 30i)

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

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CCSS.HSN.CN.A.1

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How do you write a complex number?

• a-bi

• a+bi

• ai+b

• ai-b

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CCSS.HSN.CN.A.1

What is  $\left(3-5i\right)+\left(-4+7i\right)$  ? 

•  $-1+2i$  

•  $7-12i$  

•  $1+2i$  

•  $-2+3i$  

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 $\ What\ is\ \left(-5+3i\right)-\left(4+7i\right)?$  

•  $-1-4i$  

•  $-9-4i$  

•  $-1+4i$  

•  $-9+4i$  

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CCSS.HSN.CN.A.2