(3x²-3y²)/(x+y) 怎么算?
(3x²-3y²)/(x+y) 怎么算?
(y-x)(x-y)^3(y-x)^5怎么算
(3x-y)²-2x(4x-5y)-(x+2y)²
[x(x²y²-xy)-y(x²-x³y)]÷3x²y
因式分解:[x(x²y²-xy)-y(x²-x³y)]÷3x²y
先化简再求值:(x-2y)²-(x+2y)(x-2y)-(x-3y)(x-y).其中x²+9y
先化简,在求值:(x-y)²+(3x-2y)(2x+y)-x(6x-y)
该怎么画出y=2(x+2)²+1,y=- 3/4(x-3)²+2.y=x²-x-2,y=-
X²-3XY+2Y² =(x-y)(x-2y) 中(x-2y) 是怎么算出来的?
2.(x+y)²(x-y)²-(x-y)(x+y)(x²+y²)
因式分解:(x+3y)²-x-3y
3m(x-y)-2(y-x)²因式分解