CBSE Class 10 Answered
The centre of a circle is (2x-1 ,3x + 1)Find x if the circle passes through (-3, -1)and the length of the diameter is 20 units..
Asked by | 01 Mar, 2012, 05:25: PM
Expert Answer
radius = distance between 2 points center and (-3,-1) = sqrt{ (2x-1+3)2 + (3x+1+1)2 }
= sqrt{ (9x2 + 8 + 20x) } = 10
On Solving we get the value of x
Answered by | 01 Mar, 2012, 06:24: PM
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