已知x,y满足|x-2|+(y+1)²=0,求-2xy·5xy²+(½x²y
已知实数xy满足x²﹢y²-xy+2x-y+1=0求xy
已知实数x,y满足x²+y²-xy+2x-y+1=0 求x y
已知实数xy,满足10x²-2xy+y²+6x+1=0,求x+y
已知x²+y²-2x+4y+5=0,求X^4-y^4/2x^2+xy-y²·2x-y/xy
已知实数x,y满足条件|2x+3y+1|+(x+3y+5)²=0,求式子(-2xy)²×(-y
已知X²+Y²+X²Y²-4XY+1=0 求:(X-Y)^2008-(XY)^2
已知实数x,y满足5x²+2y²+1=6xy+4x-2y,则x²-xy+2000y
已知实数x、y满足x²﹢y²-xy+2x-y+1=0,试求x、y的值
已知x+y=3 xy=-5 求x设abc=1 求x²+3xy+2y²/x²y+2xy
已知(x+1)²+|y-1|=0,求2(xy-5xy²)-(3xy²-xy)得值
实数x y满足x≥y≥1和2x²-xy-5x+y+4=0求x+y之值
已知x,y满足x(+1)-(x²+2y)=1,求x²+4xy+4y²-2x+4y的值.