Complex Number Review

Add/Subtract Complex Numbers

100

8i + 4 - (3i + 10)

-6 + 5i

200

#3. 3 + 5i + 4 + 2i - (6 - 7i)

1 + 4i

300

-18 - 3i + 11 + 5i

-7 + 2i

400

-8i - (8 - 5i) + 6i

-8 + 3i

500

#4. -i - (2 + 3i) + 2 + i

-3i

Multiply Complex Numbers

100

6i(12-4i)

72+24i

200

#5. 4i(11-9i)

36+44i

300

(2+4i)(3+3i)

-6+18i

400

#6. (12+3i)(5-2i)

66-9i

500

(3+2i)²

5+12i

Quadratic Formula or Solve for x

100

#7. x²=-90

x= +/- 3 radical 10 i

200

#10. 2x²-6x+5=0

x=3/2 +/- 1/2i

300

#8. x²+9=-15

x=+/-2 radical 6 i

400

#11. -x²+4x-5=0

x=2 +/- i

500

#9. -6x² + 17 = 125

x= +/- 3 radical 2 i

Simplify Radicals with Complex Numbers

100

#1. Radical -32

+/- 4 radical 2 i

200

Radical -80

+/- 4 radical 5 i

300

#2. Radical -144

+/- 12i

400

Radical -72

+/- 6 radical 2 i

500

Radical -225

+/- 15i

Graphing with Complex Numbers

100

#12 on review worksheet

Check answers on paper

200

#13 on review worksheet

Check answers on paper

300

#14 on review worksheet

1 + i

400

#15 on review worksheet

-2 - i

500

Random question: when is Miss Nicholson’s birthday???

You can earn 100 extra points if you get the year correct.

January 10th, 1996