Jawabanmu

2014-02-10T01:32:25+07:00
(x-a)²+(y-b)²=r²
(x+1)²+(y-3)²=(2√5)²
x²+2x+1+y²-6y+9=4.5
x²+y²+2x-6y+10=20
x²+y²+2x-6y=10


6 2 6