3xy+xy+2x²y+yx²+3x²y等于多少
3xy+xy+2x²y+yx²+3x²y等于多少
3y/2x+2y + 2xy/x²+xy等于多少过程
已知x-y=4xy,则2x+3xy-2yx-2xy-y
x²-3xy-3x²y²+2yx²-y²x 合并同类项
.先化简,后计算.[2x(x²y-xy²)+xy(xy-x²)]/x²yx=20
6x²y+2xy-3x²y²-7x-5yx-4y²x²-6x²
求6x²y+2xy-3x²y²-7x-5yx-4y²x²-6x
2x(x²y-xy²)+xy(xy-x²)]÷x²y等于多少
7x²y-2xy²+2yx²+y²x-3xy²怎么做?是合并同类项在算
化简、、、最好有过程x²y-3xy²+2yx²-y²x2、(3a²-a
(3x-y)²+6xy等于多少?
已知y=3xy+x,求代数式2x+3xy−2yx−2xy−y