a+3i |
1-2i |
A.-2 | B.4 | C.-6 | D.6 |
a+3i |
1-2i |
(a+3i)(1+2i) |
(1-2i)(1+2i) |
a-6+(2a+3)i |
5 |
(1+2i)2 |
3-4i |
1 |
|z| |
. |
z |
A.0 | B.1 | C.2 | D.3 |
1 |
i3 |
A.(1,1) | B.(1,-1) | C.(-1,1) | D.(-1,-1) |
z |
1-2i |
A.-
| B.
| C.-i | D.i |
a+i |
1+2i |
A.13 | B.
| C.1.5 | D.-2 |
. |
z |
A.5 | B.6 | C.
| D.4 |
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