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Questions  >>  CBSE XI  >>  Math  >>  Conic Sections
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Q)

Find the equation of a circle passing through the point $(7,3)$ having radius $3$ units and whose centre lies on the line $y=x-1$.

$\begin{array}{1 1}x^2+y^2-8x-6y+16=0\\x^2+y^2+8x-6y-16=0\\x^2+y^2+8x+6y+16=0\\x^2+y^2-8x-6y-16=0\end{array} $

why are they two equations and not one

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