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Homework Help: Centre of a circle

  1. Sep 30, 2010 #1
    1. The problem statement, all variables and given/known data
    Find the centre of the circle which passes through the points (1,-2) and (4,-3) whose centre lies on the line 3x + 4y = 7

    2. Relevant equations

    3. The attempt at a solution

    distance from the centre of the circle to the given points is equal
    by distance formula and simplifying,
    I got 3x-2y=10

    On Solving 3x + 4y= 7 and 3x - 2y= 10
    I got the point (3,-1/2) as the centre of the circle.
    But answer is something else.
    Please help
  2. jcsd
  3. Sep 30, 2010 #2
    I get as a second equation
    [tex] 3x -y=10[/tex]
  4. Sep 30, 2010 #3
    Damn! such a silly mistake
    Thanks mate.
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