Question: If (x 1 , y 1 ) and (x 2 , y 2 ) are the endpoints of a diameter of a circle, show that

If (x1, y1) and (x2, y2) are the endpoints of a diameter of a circle, show that an equation of the circle is (x − x1)(x − x2) + (y − y1)(y − y2) = 0

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