Introduction to Complex Numbers

What is (3 - 5i) + (-4 + 7i)?

• -1+2i

• 1+2i

• 7-12i

• -2+3i

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CCSS.HSN.CN.A.2

What is (-5 + 3i) - (4 + 7i)?

• -1- 4i

• -1+4i

• -9-4i

• -9+4i

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CCSS.HSN.CN.A.2

What is (4 - 5i)(-2 + 7i)?

• 27+18i

• -43+18i

• -43+38i

• 27+38i

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CCSS.HSN.CN.A.2

What is (3 + 4i)(3 - 4i)?

• 9-16i

• 9+16i

• 25

• -7

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CCSS.HSN.CN.C.8

What letter usually represent imaginary number?

• a
• i
• j
• x

Tags

CCSS.HSN.CN.A.1

What does i² = ?

• -1
• √-1
• 1
• -√1

Tags

CCSS.HSN.CN.A.1

Simplify:
-3i(4 + 2i)

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

Tags

CCSS.HSN.CN.A.2

Simplify: 
(10+ 15i) - (48 - 30i)

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

Tags

CCSS.HSN.CN.A.2

How do you write a complex number?

• a-bi

• a+bi

• ai+b

• ai-b

Tags

CCSS.HSN.CN.A.1