if the centre of a circle is (2a,a-7) then find value of a,if circle passes through the point(11,-9) and has diameter 10(root)2 units.
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diameter of circle = 10
units
⇒radius=5√2=√50
distance between centre and point = radius
=√(5a²-48a+125)=√50
5a²-48a+125=50
5a²-48a-75
now you can factorise it
⇒radius=5√2=√50
distance between centre and point = radius
=√(5a²-48a+125)=√50
5a²-48a+125=50
5a²-48a-75
now you can factorise it
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