Jawabanmu

2014-06-23T21:20:23+07:00
r= \frac{A(x') + (B)(y')+C}{ \sqrt{ A^{2} + B^{2} } }
persamaan=3x-4y+7=Ax-By+C
(5,-2)=(x',y')
masukin kerpersamaan..
r= \frac{3(5) + (-4)(-2)+7}{ \sqrt{ 3^{2} + (-4)^{2} } }= \frac{15+8+7}{5} =6

persamaan lingkaran = 
(x-x')²+(y-y')²=r²
(x-5)²+(y-(-2))²=6²
x²-10x+25+y²+4y+4=36
x²+y²-10x+4y-7=0