若|4x+1|+(y-1/2)²=0 xy,各等于多少
已知(4X-2Y-1)²+根号xy-2=0,求4x²y²+xy²的值
1-x²+2xy-y²
若多项式x²-2xy+y²-x+y-1=0,求x-y的值.
若1/x+1/y=3,4y-2xy-4x/3x+xy-3x等于多少
已知13x²-6xy+y²-4x+1=0 求(xy-x²)五次方
方程组{x²+y²=10(1)x²-3xy+2y²=0(2)怎么解
已知|x+2|+(y+1²=0,求x²+(2xy-3y²)-2(x²+xy-2y
1 3x²+4xy-y²=
若x+y=1,则1/2x²+xy+1/2y²=
已知5x²+4x-2xy+y²+1=0,求x,y的值
1.已知(x+2²)+(y+1的绝对值)=0,求5xy的平方-{2xy²-[3xy²-(4
计算:(1).(-2xy²)*(3x²y)²