# Find the equation

2 or more circles are said to be concentric if they have the same centre and different radii.

Given, x2 + y2 + 4x + 6y + 11 = 0

The concentric circle will have the equation

x2 + y2 + 4x + 6y + c’ = 0

As it passes through P(5, 4), putting this in the equation

52 + 42 + 45 + 64 + c’ = 0

25 + 16 + 20 + 24 + c’ = 0

c’ = - 85

The required equation is

x2 + y2 + 4x + 6y - 85 = 0

Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
view all courses
RELATED QUESTIONS :

Show that the quaRS Aggarwal - Mathematics

If ( - 1, 3) and RS Aggarwal - Mathematics

Find the equationRS Aggarwal - Mathematics

Find the equationRS Aggarwal - Mathematics

Show that the equRS Aggarwal - Mathematics

Show that the equRS Aggarwal - Mathematics