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Question

The radical axis of circles x2+y2+3x+4y5=0 and x2+y25x+5y6=0 is

A
8x+y+1=0
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B
8xy+1=0
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C
8x8y+1=0
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D
8x+y+1=0
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Solution

The correct option is D 8xy+1=0
eqn of radical axis is given by s1s2=0
s1=x2+y2+3x+4y5=0
s2=x2+y25x+5y6=0
=s1s2=0
8xy+1=0

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Radical Axis of Two Circles
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