SOLUTION: whats the standard form for x^2+y^2-4x+4y+7=0 and its center and radius? The standard form,circle and radius for x^2+y^2+6y+7=0?

Algebra ->  Graphs -> SOLUTION: whats the standard form for x^2+y^2-4x+4y+7=0 and its center and radius? The standard form,circle and radius for x^2+y^2+6y+7=0?      Log On


   

Question 975377: whats the standard form for x^2+y^2-4x+4y+7=0 and its center and radius?
The standard form,circle and radius for x^2+y^2+6y+7=0?
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
whats the standard form for x^2+y^2-4x+4y+7=0 and its center and radius?
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Complete the square for the x and y terms.
x%5E2-4x+%2B+y%5E2%2B4y+=+-7
x%5E2-4x%2B4+%2B+y%5E2%2B4y%2B4+=+-7%2B4%2B4
%28x-2%29%5E2+%2B+%28y%2B2%29%5E2+=+1
--> center at (2,-2), r = 1
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The standard form,circle and radius for x^2+y^2+6y+7=0?
Do it the same way.