已知x-y=4xy,则2x+3xy-2yx-2xy-y
已知x-y=4xy,则2x+3xy-2yx-2xy-y
已知y=3xy+x,求代数式2x+3xy−2yx−2xy−y
已知x+y=2,xy=-5,则yx+xy
已知3x2+xy-2y2=0,求(x+yx-y+4xyy
3xy+xy+2x²y+yx²+3x²y等于多少
已知代数式3-2xy+3yx^2+nxy-4x^2y中不含XY项,求N的值
已知xy满足x^2+y^2+4/5=2x+y 求代数式yx/x+y的值
已知1x-1y=3,则分式2x+3xy-2yx-2xy-y的值为( )
已知:y=1−8x+8x−1+12,则代数式xy+yx+2-xy+yx−2的值为( )
已知x2+y2-2x-4y+5=0,分式yx−xy
已知2x2-xy-3y2=0,求x−yx+y
.先化简,后计算.[2x(x²y-xy²)+xy(xy-x²)]/x²yx=20