$z^{2}+\left| {z} \right|=0$

Goi $z = a+bi  (a,b\in R)$

$z^2=a^2-b^2+2abi$

$|z|= \sqrt{a^2+b^2}$

Thay vao cai ban dau roi tu tinh nhe

Bạn cần đăng nhập để có thể gửi đáp án

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