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计算:(1)(3+4i)+(-5-3i);(2)(4-3i)(-5-4i);(3)1+i1+3i;(4)1-2i2i-2i-31+i.
题目详情
计算:
(1)(3+4i)+(-5-3i);
(2)(4-3i)(-5-4i);
(3)
;
(4)
-
.
(1)(3+4i)+(-5-3i);
(2)(4-3i)(-5-4i);
(3)
1+i |
1+3i |
(4)
1-2i |
2i |
2i-3 |
1+i |
▼优质解答
答案和解析
(1)(3+4i)+(-5-3i)=-2+i;
(2)(4-3i)(-5-4i)=(-20-12)+(-16+15)i=-32-i;
(3)
=
=
=
-
i;
(4))
-
=
-
=
-
=-
-3i.
(2)(4-3i)(-5-4i)=(-20-12)+(-16+15)i=-32-i;
(3)
1+i |
1+3i |
(1+i)(1-3i) |
(1+3i)(1-3i) |
4-2i |
10 |
2 |
5 |
1 |
5 |
(4))
1-2i |
2i |
2i-3 |
1+i |
(1-2i)i |
2i•i |
(2i-3)(1-i) |
(1+i)(1-i) |
2+i |
-2 |
-1+5i |
2 |
1 |
2 |
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