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Template:Quadratic function graph complex roots.svg

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Visualisation of the complex roots of $y = ax 2 + bx + c$ : the parabola is rotated 180° about its vertex (orange). Its $x$ -intercepts are rotated 90° around their mid-point, and the Cartesian plane is interpreted as the complex plane (green).^[1]

^ "Complex Roots Made Visible – Math Fun Facts". Retrieved 1 October 2016.

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