Here we see two important number. The '''complex cojugate''', <math>\bar{z}=\overline{x+iy}=x-iy</math> and the length of a complex number <math>{||z||}^{2}=z.\bar{z}=x^{2}+y^{2}.</math>
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Here we see two important number. The '''complex conjugate''', <math>\bar{z}=\overline{x+iy}=x-iy</math> and the length of a complex number <math>{||z||}^{2}=z.\bar{z}=x^{2}+y^{2}.</math>