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Omni-MATH / Coordinate axes (without any marks, with the same scale) and the graph of a…

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Coordinate axes (without any marks, with the same scale) and the graph of a quadratic trinomial y=x2+ax+by = x^2 + ax + b are drawn in the plane. The numbers aa and bb are not known. How to draw a unit segment using only ruler and compass?
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Coordinate axes (without any marks, with the same scale) and the graph of a quadratic trinomial y=x²+ax+b are drawn in the plane. The numbers a and b are not known. How to draw a unit segment using only ruler and compass?
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Coordinate axes (without any marks, with the same scale) and the graph of a quadratic trinomial $y = x^2 + ax + b$ are drawn in the plane. The numbers $a$ and $b$ are not known. How to draw a unit segment using only ruler and compass?

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