Right isosceles triangle with right angle at (2, 1) and hypotenuse on 2x + y = 3: joint equation of the other two sides

1. A.
   $3x^{2}-3y^{2}+8xy+20x+10y+25=0$
2. B.
   $3x^{2}-3y^{2}+8xy-20x-10y+25=0$
3. C.
   $3x^{2}-3y^{2}+8xy+10x+15y+20=0$
4. D.
   $3x^{2}-3y^{2}-8xy-10x-15y-20=0$

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1. A.
   $3x^2+8xy-3y^2-20x-10y+25=0$
2. B.
   $3x^2-8xy-3y^2-20x-10y-25=0$
3. C.
   $3x^2+8xy-3y^2+20x+10y+25=0$
4. D.
   $3x^2-8xy-3y^2+20x+10y-25=0$

Tap an option to check your answer.