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+(3+2a)i |
5 |
A.第一象限 | B.第二象限 | C.第三象限 | D.第四象限 |
A.0 | B.-1 | C.-3 | D.3 |
m |
1+i |
A.1 | B.2 | C.i | D.2i |
1 |
a+5 |
A.3 | B.-5 | C.3或-5 | D.-3或5 |
A.ad+bc=0 | B.ac+bd=0 | C.ac=bd | D.ad=bc |
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