Centre of circle \[(x-{{x}_{1}})(x-{{x}_{2}})\] \[+(y-{{y}_{1}})(y-{{y}_{2}})\] \[=0\] is

\[\left( \frac{{{x}_{1}}-{{x}_{2}}}{2},\ \frac{{{y}_{1}}-{{y}_{2}}}{2} \right)\]

\[\left( \frac{{{x}_{1}}+{{y}_{1}}}{2},\ \frac{{{x}_{2}}+{{y}_{2}}}{2} \right)\]

\[\left( \frac{{{x}_{1}}-{{y}_{1}}}{2},\ \frac{{{x}_{2}}-{{y}_{2}}}{2} \right)\]

\[\left( \frac{{{x}_{1}}+{{x}_{2}}}{2},\ \frac{{{y}_{1}}+{{y}_{2}}}{2} \right)\]

Centre of circle \[(x-{{x}_{1}})(x-{{x}_{2}})\] \[+(y-{{y}_{1}})(y-{{y

1.	Centre of circle \[(x-{{x}_{1}})(x-{{x}_{2}})\] \[+(y-{{y}_{1}})(y-{{y}_{2}})\] \[=0\] is
A.	\[\left( \frac{{{x}_{1}}+{{y}_{1}}}{2},\ \frac{{{x}_{2}}+{{y}_{2}}}{2} \right)\]
B.	\[\left( \frac{{{x}_{1}}-{{y}_{1}}}{2},\ \frac{{{x}_{2}}-{{y}_{2}}}{2} \right)\]
C.	\[\left( \frac{{{x}_{1}}+{{x}_{2}}}{2},\ \frac{{{y}_{1}}+{{y}_{2}}}{2} \right)\]
D.	\[\left( \frac{{{x}_{1}}-{{x}_{2}}}{2},\ \frac{{{y}_{1}}-{{y}_{2}}}{2} \right)\]
Answer» D. \[\left( \frac{{{x}_{1}}-{{x}_{2}}}{2},\ \frac{{{y}_{1}}-{{y}_{2}}}{2} \right)\]

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Centre of circle \[(x-{{x}_{1}})(x-{{x}_{2}})\] \[+(y-{{y}_{1}})(y-{{y}_{2}})\] \[=0\] is

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