化简、、、最好有过程x²y-3xy²+2yx²-y²x2、(3a²-a
化简、、、最好有过程x²y-3xy²+2yx²-y²x2、(3a²-a
3xy+xy+2x²y+yx²+3x²y等于多少
x²-3xy-3x²y²+2yx²-y²x 合并同类项
6x²y+2xy-3x²y²-7x-5yx-4y²x²-6x²
求6x²y+2xy-3x²y²-7x-5yx-4y²x²-6x
跪求-3y²-2yx+x²因式分解的详细过程T^T!
.先化简,后计算.[2x(x²y-xy²)+xy(xy-x²)]/x²yx=20
7x²y-2xy²+2yx²+y²x-3xy²怎么做?是合并同类项在算
3X²y-3y²X+2Xy²-2yX²当y=-2,X=3时.
(x³-2xy²)dy+(2y³-3yx²)dx=0求通解
一道初一合并同类项题 2x²y-2y²x+2xy²+2yx²
已知3x2+xy-2y2=0,求(x+yx-y+4xyy