若4x^2+|x-6|+9y^2=12xy,则x+y=
若x+y=-1,则x^4+5x^3y+x^2y+8x^2y^2+xy^2+5xy^3+y^4=( )
若(x*x+y*y)(x*x+y*y)-4x*x*y*y=0,求代数式(x*x+5xy+y*y)/(x*x+2xy+y*
若(2x-14xy-2y)除以(x-2xy-y)=4,则1/x-1/y=
2 21.(2x+3y) -(x+2y) 2 2 2 22.3|x-3|+x -6xy+9y =0 则x y+2xy=?
A=2x²-3xy+y²-x+2y,B=4x²-6xy+2y²+3x-y,若x=
x*-2xy+3y*=9 4x*-5xy+6y*=30
设A=2x²-3xy+y²-x+2y,B=4x²-6xy+2y²-3x-y,若x
设A=2x²-3xy+y²-x+2y,B=4x²-6xy+2y²+3x-y.若x
已知x*x-4xy+4y*y=0 求[2x(x+y)-y(x+y)]/(4x*x-4xy+y*y)的值?
4x^2+y^2-4x+6y+10=0,4x^2-12xy+9y^2
已知4x^2+y^2-4xy-12x+6y+9=0,求x,y的关系
已知x-y=4xy,则2x+3xy-2yx-2xy-y