5(x2+y2−2x+6y)+49=05\left(x^{2}+y^{2}-2 x+6 y\right)+49=05(x2+y2−2x+6y)+49=0
x2+y2−2x+6y+49=0x^{2}+y^{2}-2 x+6 y+49=0x2+y2−2x+6y+49=0
5(x2+y2+2x+6y)+49=05\left(x^{2}+y^{2}+2 x+6 y\right)+49=05(x2+y2+2x+6y)+49=0
x2+y2+2x+6y+49=0x^{2}+y^{2}+2 x+6 y+49=0x2+y2+2x+6y+49=0