Respostas

2013-09-26T11:00:22-03:00
2*x=(y-4)^2-17 
2x=y²-8y+16-17
y²-2x-8y-1=0
2x-y²+8y+1=0
x=(y²-8y-1)/2
y=(-1-2x)/(y-8)