Complex Numbers

Adding Complex Numbers

100

2i+(2i+2)

4i+2

200

(3i-5)+(i+1)

4i-4

300

7+(3+2i)

10+2i

400

(-i+1)+(-2i+1)

-3i+2

500

(8+52i)+(-12-40i)

-4+12i

Subtracting Complex Numbers

100

3i-2i

i

200

(i+1)-(i+1)

0

300

(-3i+1)-(i+2)

-4i-1

400

(5i-3)-(9i+10)

-4i-5

500

(-53i+22)-(28i-11)

-81i+33

Multiplying Complex Numbers

100

(2i)(-i)

2

200

(-5i)(6i)

30

300

(6i)(2+5i)

-30+12i

400

(1+3i)(2-4i)

14+2i

500

2i(4-5i)(4+5i)

82i

Solving Quadratic Equations with Complex Solutions

100

x^2 +9=0

x=+/- 3i

200

x^2+2x-2=0

x=1+i, 1-i

300

3x^2+27=0

x=+/- 3i

400

5x^2+90=0

x=+/- 3i  root 2

500

2x^2-6x+8=0

x=(3+i times root 7)/2 

x=(3-i times root 7)/2