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Veva Garcia edited untitled.tex
almost 8 years ago
Commit id: 77e15ea80f6e75dcab8d561ff61811452a460d83
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Then we have, $\left|z^2\right|+Re(az)+b=0,$\\
By substitution we get the following: $x^2+y^2 + Re((c+di)(x+yi))+b =0$ \\
$\Leftrightarrow x^2+y^2 By algebra, $x^2+y^2 + Re(cx+cyi+dxi+dyi^2)+b=0$\\
$\Leftrightarrow $ x^2+y^2 + Re(cx-dy+i(dx+cy))+b=0$\\
$\Leftrightarrow x^2 +y^2 + cx-dy + b=0$\\
$\Leftrightarrow (x^2+cx) +(y^2-dy) +b =0$\\
$\Leftrightarrow (x+\frac{1}{2}c)^2 + (y-\frac{1}{2}d)^2 = -b + \frac{1}{4}(c^2+d^2)$ by completing the square\\