1.

A parabola y=ax2+bx+c crosses the x-axis at (α,0)(β,0) both to the right of the origin. A circle also passes through these two points. The length of a tangent from the origin to the circle is

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A parabola y=ax2+bx+c crosses the x-axis at (α,0)(β,0) both to the right of the origin. A circle also passes through these two points. The length of a tangent from the origin to the circle is



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