A) \[x+y+1=0\]
B) \[5x+y+2=0\]
C) \[2x+2y+5=0\]
D) \[3x+y+3=0\]
Correct Answer: A
Solution :
\[{{S}_{1}}={{x}^{2}}+{{y}^{2}}+4x+1=0\] \[{{S}_{2}}={{x}^{2}}+{{y}^{2}}+6x+2y+3=0\] Common chord \[\equiv {{S}_{1}}-{{S}_{2}}=0\Rightarrow 2x+2y+2=0\] \[\Rightarrow x+y+1=0\].You need to login to perform this action.
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