6x²y+2xy-3x²y²-7x-5yx-4y²x²-6x²
6x²y+2xy-3x²y²-7x-5yx-4y²x²-6x²
求6x²y+2xy-3x²y²-7x-5yx-4y²x²-6x
3xy+xy+2x²y+yx²+3x²y等于多少
.先化简,后计算.[2x(x²y-xy²)+xy(xy-x²)]/x²yx=20
x²-3xy-3x²y²+2yx²-y²x 合并同类项
合并同类项:6x^2y+2xy-3x^2y^2-7x-5yx-4y^2x^2-6x^2y
x²/xy-x/y
化简 (x+y)(x²-xy+y²) ; 3(2x-1)(x+6)-5(x-3)(x+6)
(x-6y)/(x²-4y²)+(2y)/(x²-2xy)
已知x²+y²-8x+6y+25=0,求(x-y+4xy/x-y)(x+y-4xy/x+y)
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