CBSE Class 10 Answered
Coordinate geometry
Asked by sonali221994 | 15 Dec, 2009, 04:56: PM
Expert Answer
If equation of the circle
(x-(3p+1))2 + (y-(2p-1))2 = 102
Since the circle passes through (-1,-3)
(-1-(3p+1))2 + (-3-(2p-1))2 = 102
(-3p-2)2 + (-2p-2)2 = 100
13p2 + 20p + 8 = 100
13p2 + 20p - 92 = 0
p = {-20±(400+4x13x92)1/2}/26 = {-20±72}/26
Hence p = -92/26 = -46/13 or 52/26 = 2.
Regards,
Team,
TopperLearning.
Answered by | 15 Dec, 2009, 05:42: PM
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