SOLUTION: Determine the equation of each circle. a) centre (2,-5) and radius 7 b) centre (-1,3) and passing through (4,1)

Algebra ->  Points-lines-and-rays -> SOLUTION: Determine the equation of each circle. a) centre (2,-5) and radius 7 b) centre (-1,3) and passing through (4,1)       Log On


   

Question 393711: Determine the equation of each circle.
a) centre (2,-5) and radius 7
b) centre (-1,3) and passing through (4,1)
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
Determine the equation of each circle.
a) centre (2,-5) and radius 7
%28x-2%29%5E2+%2B+%28y%2B5%29%5E2+=+7%5E2
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b) centre (-1,3) and passing through (4,1)
Find the distance between the 2 points, that's the radius.
Then
%28x%2B1%29%5E2+%2B+%28y-3%29%5E2+=+r%5E2