若y=x-3-3-x+x2,计算xy的结果是( )
x(x-1)-(x2-y)=-3,求x2+y2-2xy的值
计算(y-x)×xy/x的平方-y的平方的结果是( ).
已知实数x,y满足x2+xy+y2=3,则x2-xy+y2的最小值
xy=-2,x+y=3 求(3xy+10y)+[5x-(2xy+2y-3x)]的运算过程和结果是什么
x(x-1)-(x2-y)=-3,求x2-y2-2xy的值
已知x(x-1)-(x2-y)=-3,求x2+y2-2xy的值
计算:3xy[2xy-x(y-2)+x]
(4x的平方y)(-xy的三次方)的五次方的计算结果是( )
已知x(x-1)-(x2-y)=-3,求x2+y2-2xy的值.
计算:[x(x2y2-xy)-y(x2+x3y)]÷3x2y.
计算:[x(x2y2-xy)-y(x2-x3y)]÷3x2y.
计算4xy+(x-2y)的平方+(x+3y)(3y-x)