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数学
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已知i是虚数单位,则(2+i)(3+i)=( )
A. 5-5i
B. 7-5i
C. 5+5i
D. 7+5i
人气:319 ℃ 时间:2020-01-28 12:14:35
解答
复数(2+i)(3+i)=6+5i+i
2
=5+5i.
故选C.
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