4.4 Complex Numbers

SImplify:

(-4 - 7i) - (1 + 4i)

• -3 - 11i

• -3 + 11i

• -5 + 11i

• -5 - 11i

Tags

CCSS.HSN.CN.A.2

Simplify:

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

• 35i + 25i²

• 35i -25i²

• -25 + 35i

• 25 + 35i

Tags

CCSS.HSN.CN.A.2

Simplify:

(4 - 6i)(8 + 4i)

• 56 - 32i

• 32 + 24i

• 56 + 32i²

• 56 + 32i

Which is the conjugate of $\left(3-4i\right)$  ?

•  $\left(3-4i\right)$  

•  $\left(3+4i\right)$  

•  $\left(-3-4i\right)$  

•  $-i$  

Tags

CCSS.HSN.CN.A.3

What does i² = ?

• -1
• √-1
• 1
• -√1

Tags

CCSS.HSN.CN.A.1

Simplify: 
(7 + 2i)(9 - 6i)

• 75-24i
• 63 - 24i  - 12i²
• 51 - 24i
• 58 + 60i

Tags

CCSS.HSN.CN.A.2

Simplify
3i - (4 + 7i)

• -4 + 10i
• 21 - 12i
• 4 - 10i
• -4 - 4i

Tags

CCSS.HSN.CN.A.2

The expression (2 + 3i)² is equal to

• -5
• -5 + 12i
• 13
• 13 + 12i

Tags

CCSS.HSN.CN.C.8

√-36

• 6
• -6
• -6i
• 6i

Tags

CCSS.HSN.CN.A.2

CCSS.HSN.CN.A.1

Simplify.

• 
• 
• 
• 

Tags

CCSS.HSA.SSE.A.2

CCSS.HSA.SSE.B.3

CCSS.HSN.RN.A.2