xy^2-x-yx^2+y变为(y-x)(xy+1)
已知x-y=4xy,则2x+3xy-2yx-2xy-y
-x^2y+5xy^2-yx^2合并同类项
3xy+xy+2x²y+yx²+3x²y等于多少
.先化简,后计算.[2x(x²y-xy²)+xy(xy-x²)]/x²yx=20
已知y=3xy+x,求代数式2x+3xy−2yx−2xy−y
xy+yx=10x,y是多少
已知x+y=2,xy=-5,则yx+xy
已知:y=1−8x+8x−1+12,则代数式xy+yx+2-xy+yx−2的值为( )
3x^2y-3xy^2+6yx^2-9y^2x
实数x、y、z满足x=6-3yx+3y-2xy+2z
(x+y-2xy)(x+y-2)+(1-xy)²
已知xy满足x^2+y^2+4/5=2x+y 求代数式yx/x+y的值