(a, b) = (c, d) ก็ต่อเมื่อ a=c และ b=d

(a, b)(c, d) = (ac-bd, ab+cd)

(a, b) + (c, d) = (a+c, b+d)

(a, b)(c, d) = (ac-bd, ad+bc)

4

-4

0

4i

8i

-8i

-8

8

4i

$$1-\sqrt{-9}$$

$$1-\sqrt{-3}$$

$$1+\sqrt{-9}$$

(9,1)

(9,-1)

(5,-11)

(-5,11)

1 + 9i

1 – i

5 + i

5 – 9i

-1 + i

1 + i

1 - i

-1 - i

-1+i

-2+i

-3+i

-4+i

32i

-32i

32

-32

$$\frac{2+i}{20}$$

$$\frac{2-i}{20}$$

$$\frac{3-2i}{20}$$

$$\frac{3+2i}{20}$$

-4 - 3i

-4 + 3i

4 - 3i

4 + 3i

$$\left(\frac{4}{25},\frac{3}{25}\right)$$

$$\left(\frac{4}{25},-\frac{3}{25}\right)$$

$$\left(\frac{4}{7},\frac{3}{7}\right)$$

$$\left(\frac{4}{7},-\frac{3}{7}\right)$$

i

-i

1

-1

0

1

-1

i

1 – i

– 2 + 2i

4 + 2i

2 + 2i

 −3

3

$$-\sqrt[]{5}$$

$$\sqrt[]{5}$$

-2

2

-2i

2i

-z = (3, 1)

$$\overline{z}\ =\ \left(-3,-1\right)$$

$$\left|z\right|=\left(3,\ 1\right)$$

$$z^{-1^{ }}=\left(\frac{3}{4},\frac{1}{4}\right)$$