2.1 Complex Numbers

​2.1 Complex Numbers

Multiple Choice

What letter represents an imaginary number? #1

• a

• i

• j

• x

Multiple Choice

$$i=\sqrt[]{-1}$$  #2

• True

• False

Multiple Choice

How do you write a complex number? #3

• a-bi

• a+bi

• ai+b

• ai-b

Multiple Choice

What does i² equal? #4

• -1

• √-1

• 1

• -√1

Multiple Choice

#5

• 10
• -10
• 10i
• -10i

Multiple Choice

-6i+3i #7

• 3i
• -3i
• -2i
• -3i²

Multiple Choice

(3 + 2i) + (4 - 5i) #8

• 7 + 7i

• 1 - 3i

• 1 - 7i

• 7 - 3i

Multiple Choice

(4 - 2i) - (3 + 6i) #9

• 7 - 4i

• 1 + 4i

• 1 - 8i

• 7 - 8i

Multiple Choice

• A
• B
• C
• D

Multiple Choice

• A
• B
• C
• D

Multiple Choice

Solve
3x² - 5 = -446

• ±√-147
• 7i√3
• ±7i√3
• -7√3