Mathematical simulation test paper for the 2007-2008 school year college entrance examination in Pudong New Area (liberal arts volume)
y^2 -2x+2y-2=0
x 1+x2=-B
x 1*x2=C
x 1^2 +x2^2=2
B^2 -2C=2
C=(B^2 -2)/2
= & gtx=B+C，y=B
= & gt(y+ 1)^2=2x+3 = & gt； y^2 -2x+2y-2=0