Find the standard equation of a circle given the diameter whose end point A (-1, 4} and B (4,2)
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By Diametrcial form of circle
( x - x1) ( x - x2) + ( y - y1) ( y - y2) = 0
( x + 1) ( x - 4) + ( y - 4) ( y - 2) = 0
x² - 3x - 4 + y² - 6y + 8 = 0
x² + y² - 3x - 6y + 4 = 0
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