Complex Numbers Lesson

Simplify: (i)⁹

• i

• -1

• -i

• 1

Simplify:

4 - 5i + 7 + 10i

• -3 + 15i

• 16i

• 11 + 15i

• 11 + 5i

Simplify:

-2(6 - 2i)

• -12 - 4i

• 12 - 4i

• -12 + 4i

• 12 + 4i

Simplify:

(2 - 5i)(4 + i)

• 13

• 3

• 6 - 4i

• 13 - 18i

i⁷⁹

• i

• 1

• -1

• -i

If z=√2+√2 i then arg(z²)=

• 0^o

• 60^o

• 90^o

• Not Possible

Lisa wants to buy two new dresses from the mall. If one dress costs (59 - 6i) and the other costs (34 + 17i), how much money will she need to bring to the mall?

• 82 dollars

• 93 + 11i dollars

• 93 - 23i dollars

• 25 - 23i dollars

3+√-4

• 1

• 3-2i

• 5

• 3+2i

Simplify:

(-2 + i)²

• 3

• 4 + i²

• 3 - 4i

• 4i²