Complex Numbers. Matrices, & Vectors Review

How do you write a complex number?

• a-bi

• a+bi

• ai+b

• ai-b

Tags

CCSS.HSN.CN.A.1

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

• -2+6i
• 12+6i
• -35-16i²
• -35 -16i

Tags

CCSS.HSN.CN.A.1

CCSS.HSN.CN.A.2

Simplify:
-3i(4 + 2i)

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

Tags

CCSS.HSN.CN.A.2

Multiply: 
(4 – 3i)(-7 – 2i)

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

Tags

CCSS.HSN.CN.A.1

CCSS.HSN.CN.A.2

Simplify: 
(10+ 15i) - (48 - 30i)

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

Tags

CCSS.HSN.CN.A.1

CCSS.HSN.CN.A.2

• A
• B
• C
• D

Tags

CCSS.HSN.CN.A.1

CCSS.HSN.CN.A.2

CCSS.HSN.CN.A.3

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

CCSS.HSN.CN.B.5

What is the complex conjugate of  4-3i?

• A.  1/(4-3i)
• B. 1/(4+3i)
• C.  -4 + 3i
• D.  4 + 3i

Tags

CCSS.HSN.CN.A.3

i⁷

• i
• -i
• 1
• -1

Tags

CCSS.HSN.CN.A.2

What complex number is represented by the graph?

• -3-i
• -3+i
• 1+3i
• 1-3i

Tags

CCSS.HSN.CN.B.4