Z complex number : http://www.mathramz.com/xyz/latexren...2926a3ee70.png
1 ) prouve http://www.mathramz.com/xyz/latexren...d703324f5d.png is the conjugate of http://www.mathramz.com/xyz/latexren...f6f36212d4.png
2 ) calculate http://www.mathramz.com/xyz/latexren...c9cbc58489.png
3 ) deduct : http://www.mathramz.com/xyz/latexren...d703324f5d.png , http://www.mathramz.com/xyz/latexren...f6f36212d4.png
