Question

5. The X- coordinates of the points A and B are the roots
of the equation x2 – 5x + 6 = 0 and y-coordinates of
A, B are roots of the equation y-2y-3=0. The radius
of the circle on AB as diameter is

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Answer 1

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( x + 1 )² + ( y + 2 )² = a² + b² + 5