AP EAMCET · Maths · Circle
The equation of the common chord of the circles \(x^2+y^2+2 x+3 y+1=0\) and \(x^2+\) \(y^2-5 x-6 y+4=0\) is
- A \(3 x-3 y+5=0\)
- B \(7 y+9 x-3=0\)
- C \(7 x-9 y+3=0\)
- D \(7 x+9 y-3=0\)
Answer & Solution
Correct Answer
(D) \(7 x+9 y-3=0\)
Step-by-step Solution
Detailed explanation
\(S_1 - S_2 = 0\) \((x^2+y^2+2 x+3 y+1) - (x^2+y^2-5 x-6 y+4) = 0\) \(7x + 9y - 3 = 0\)
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