The combined equation of the direct common tangents of the circles $x^2+y^2-2 x-2 y-2=0$ and $x^2+y^2+4 x+6…

The combined equation of the direct common tangents of the circles $x^2+y^2-2 x-2 y-2=0$ and $x^2+y^2+4 x+6 y+12=0$, is
  1. $3 x^2+10 x y+3 y^2-4 x+4 y-4=0$
  2. $75 x^2-9 y^2-80 x y+200 x+500 y-2900=0$
  3. $9 x^2-16 y^2-18 x+96 y-135=0$
  4. $15 x^2-24 x y+8 y^2-18 x-8 y-73=0$

Solution

No solution. Refer to answer key.

Asked in: AP EAMCET 2017 (25 Apr Shift 1)

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