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Find the equation of a circle which pass...

Find the equation of a circle which passes through the point `(3, 2)` and concentric with the circle `x^(2)+y^(2)-4x +2y - 1=0`.

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Let equation of circle concentric with circle `x^(2)+y^(2)-4x +2y -1-0` be
`x^(2)+y^(2)-4x+2y+x=0`...(1)
This circle passes through the point `(3, 2)`
`:. 9+4-12+4+c=0`
`rArr c=-5`
Put `c=-5` in eq. (1)
`x^(2)+y^(2)-4x+2y-5=0`.
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