1.3 - Complex and Imaginary Numbers

What does i² =  ?

• 1

• -1

• √-1

• √1

Multiply: 
(4 – 3i)(-7 – 2i)

• A.  -23 + 13i

• B.  -23 - 29i

• C.  -34 + 13i

• D.  -34 - 29i

Simplify:

(10 + 15i) - (48 - 30i)

• 58 - 45i

• 58 - 15i

• -38 - 15i

• -38 + 45i

Find the sum.

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

• -2 + 6i

• 12 + 6i

• -35 - 16i²

• -35 - 16i

Multiply:

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

• 29

• 4 - 25i

• 25 - 10i

• -21

(2i)(3i)

• 5i

• -5

• 6i²

• -6

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

Simplify

• (-10+6i)/17

• (-8+15i)/17

• (-23+36i)/25

• (-21+33i)/34