TS EAMCET 20-July-2022 Shift 2 Solved Paper

Section: Mathematics
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Question : 55 of 160
 
Marks: +1, -0
If (−1,−1) is the radical centre of the circles x2+y2+2gx−4y+4=0, x2+y2+6x+2fy+12=0 and x2+y2+10y+20=0 then g−f=
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