Complex Number Operations

What does i² = ?

• -1
• √-1
• 1
• -√1

Tags

CCSS.HSN.CN.A.1

Find the sum.
(5-2i) + (-7+8i)

• -2+6i
• 12+6i
• -35-16i²
• -35 -16i

Tags

CCSS.HSN.CN.A.2

(7 - 5i)(7 + 5i)

• 74
• 24
• 49 - 25i
• 49 + 25i

Tags

CCSS.HSN.CN.C.8

Simplify    3i + 2i

• 5i
• 5i²
• 6i
• -5

Tags

CCSS.HSN.CN.A.2

What is the simplified form of (-9 + 5i) + (3 -2i)

• -12 + 31i

• -6 + 3i

• -11 + 7i

• 5 - 3i

Tags

CCSS.HSN.CN.A.2

Simplify:

(2 + 3i)(2 - 3i)

• 4 + 9i

• 13

• -5

• -5i

Tags

CCSS.HSN.CN.C.8

 $\frac{4i}{9-10i}=?$  

•  $\frac{-4}{19}$  

•  $\frac{-4}{181}$  

•  $\frac{4}{19}$  

•  $\frac{-4}{10+9i}$  

Tags

CCSS.HSN.CN.A.3

• A
• B
• C
• D

Tags

CCSS.HSN.CN.A.1

• A

• B

• C

• D

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CCSS.HSN.CN.A.3

Simplify:

(2 - 5i)(4 + i)

• 13

• 3

• 6 - 4i

• 13 - 18i

Tags

CCSS.HSN.CN.A.2