y=-10x²+110x+2100怎么化简
方程组{x²+y²=10(1)x²-3xy+2y²=0(2)怎么解
已知x²y²+x²+y²=10xy-16 求x,y
已知4x²+y²-4x+6y+10=0,怎么求4x²-12xy+9y²
已知2x-y=10,求[(x²+y²)-(x-y)²+2y(x-y)]/4y
1.已知x²-10x+y²+4y+29=0,求x²+y²值.
化简求值:已知x、y,满足:x²+y²-4x+6y+13=0
xy²/(x²y-y) × x²/(x²+x)=
xy²/(x²y) - y×x²/(x²+x)=
已知(x²+y²)(x²+y²-6)+9=0 ,求x²+y²
求圆x²+y²-10x-10y=0 与 x²+y²-6x+2y-40=0 的公共
求两圆C1:x²+y²-10x-10y=0,C2:x²+y²+6x+2y-40=0
求圆心在直线x+y=0上,且过两圆x²+y²+10y-24=0,x²+y²+2x