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Question

The circles x2+y24x+6y+8=0 and x2+y210x6y+14=0

A
touch externally
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B
touch internally
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C
intersect
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D
do not meet
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Solution

The correct option is A touch externally
[ From point (1) ]
S1:x2+y24x+6y+8=0

C1(2,3) and radius=r1=5
S2:x2+y210x6y+14=0
C2(5,3) and r2=20=25
C1C2=5=r1+r2=35
C1C2=r1+r2
S1 and S2 touching externally.

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