Complex numbers easy

√-4

• -2

• -2i

• 2

• 2i

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CCSS.HSN.CN.A.1

CCSS.HSN.CN.A.2

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

• -2+6i
• 12+6i
• -35-16i²
• -35 -16i

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CCSS.HSN.CN.A.1

CCSS.HSN.CN.A.2

What does i² = ?

• -1
• √-1
• 1
• -√1

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CCSS.HSN.CN.A.1

CCSS.HSN.CN.A.2

(2i)(3i)

• 5i
• -5
• 6i
• -6

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CCSS.HSN.CN.A.1

CCSS.HSN.CN.A.2

(-3-i)(6-i)

• -21-7i
• -19-3i
• -15-5i
• -17-9i

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CCSS.HSN.CN.A.1

CCSS.HSN.CN.A.2

Simplify:
-3i(4 + 2i)

• 6 - 12i
• 6 + 12i
• -12i - 6i²
• -12i + 6i²

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CCSS.HSN.CN.A.1

CCSS.HSN.CN.A.2

Simplify.

• -5i
• 5
• 5i
• -5

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CCSS.HSN.CN.A.1

CCSS.HSN.CN.A.2

Multiply: 
(4 – 3i)(-7 – 2i)

• A.  -23 + 13i
• B.  -23 - 29i
• C.  -34 + 13i
• D.  -34 - 29i

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CCSS.HSN.CN.A.1

CCSS.HSN.CN.A.2

Simplify: 
(10+ 15i) - (48 - 30i)

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

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CCSS.HSN.CN.A.1

CCSS.HSN.CN.A.2

(-7+6i)²

• 49+36i

• 85

• 13-84i

• 13+84i

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CCSS.HSN.CN.A.1

CCSS.HSN.CN.A.2