write the equation of a circle that passes through two point

[isu23pink]

"Write and equation of the circle that passes through (2,8) with center (-3,4)"
this is what i did:
[attachment=0:3atqf773]10-25-2009 9;53;23 PM.JPG[/attachment:3atqf773]
WRONG -_-

 

[wjm11]

(25 + 16)^.5 = (25)^.5 + (16)^.5

No, no, no, no. You cannot separate these into two square roots unless they are multiplied together -- not added.

Keep your answer as r = (41)^.5

So,

(x+3)^2 + (y-4)^2 = 41