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2 Simple Questions!

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SGVaibhav:
understood everything EXCEPT, what do u do after finding a, b and c in the 2nd question.

astarmathsandphysics:
sub them into th e formula for the circle x^2+y^2+ax+by=c

SGVaibhav:
so how do we then get the center and radius, i forgot ???

astarmathsandphysics:
Complete the square. Will do it proper when I get home

SGVaibhav:
oh yeah, i found out something...

i got another method, it says Centre = (-A/2  , -B/2)    (i dont know if its right)
                                    and radius = Square root of ( (-a/2)^2  +   (-b/2)^2   - c))     [square root of   -a/2 square + -b/2 square - c]

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