1.3 - Complex and Imaginary Numbers

What does i² =  ?

• 1
• -1
• √-1
• √1

Tags

CCSS.HSN.CN.A.1

Multiply: 
(4 – 3i)(-7 – 2i)

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

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

Find the sum.

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

• -2 + 6i

• 12 + 6i

• -35 - 16i²

• -35 - 16i

Tags

CCSS.HSN.CN.A.2

Multiply:

(2 - 5i)(2 + 5i)

• 29

• 4 - 25i

• 25 - 10i

• -21

Tags

CCSS.HSN.CN.C.8

(2i)(3i)

• 5i
• -5
• 6i²
• -6

Tags

CCSS.HSN.CN.A.2

Simplify √-23

• -√23
• 23i
• 23
• i√23

Simplify √-45

• 3i√5
• -3i√5
• -i√45
• 45i

Which expression is equivalent to (-6 + i)²?

• 36 - 12i
• 35 - 12i
• 36i²
• 35i

Tags

CCSS.HSN.CN.C.8

Simplify

• (-10+6i)/17
• (-8+15i)/17
• (-23+36i)/25
• (-21+33i)/34

Tags

CCSS.HSN.CN.A.3