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Câu 13:

Phần thực của số phức $\left( {2 - i} \right)\left( {1 + 2i} \right)$

Câu 13: Phần thực của số phức (2−i)(1+2i)\left( {2 - i} \right)\left( {1 + 2i} \right)(2−i)(1+2i) là:

Thông tin câu hỏi

Câu 13:

Phần thực của số phức $\left( {2 - i} \right)\left( {1 + 2i} \right)$ là: