pers. lingkaran dgn pusat (1,-3) menyinggung sumbu x adalah...

[tex](x - a) {}^{2} + (y - b) {}^{2} = 3 \\ = (x - 1) {}^{2} + (y - ( - 3)) {}^{2} = 3 \\ = {x}^{2} - 2x + 1 + {y}^{2} + 5y + 6 = 3 \\ = {x}^{2}+ {y}^{2} - 2x + 5y + 7 = 3 \\ = {x}^{2}+ {y}^{2} - 2x + 5y + 4 = 0[/tex]
jadi itulah jawabannya.... bener kagak ya???