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equation of circle passing through (-1,-2) and concentric to the circle x 2 +y 2 +3x+4y+1=0 is

equation of circle passing through (-1,-2) and concentric to the circle x+y2+3x+4y+1=0 is

Grade:11

1 Answers

Arun
25763 Points
2 years ago
Dear student
 
concemtric circle means it is with same centre.
hence centre of required circle = (-3/2, -4/2)
 
also it passes throgh (-1, -2)
hence radius= sqrt (1/4) = ½
 
hence equation of circle
 (x+3/2)^2 + (y+2)^2= 1/4
 

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