(x-2y)³÷(2y-x)²为什么等于x-2y?
(x-2y)³÷(2y-x)²为什么等于x-2y?
(x-y)的四次方(x-y)-2(x-y)²(y-x)³等于?
3X+3Y/X^2-Y^2为什么等于3/X-Y
(8x-2y)(8y-2x)为什么等于4(4x-y)(4y-x)
[(-x-y)(-x+y)-(x+y)^2-x(y-y^2)}÷1/2y
(x-2y)³÷(2y-x)²等于多少? (-x)²×(-x)³等于多少?
求因式分解(x-y)²-2(x-y)³和(x+y)(x-y)-x(x-y)
化简x-y分之x + x³-2x²y+xy²分之y³ ÷ y²-x
[x(x-y)-y(x-y)+(x+y)(x-y)]÷2x其中x=2012 y=2013
若(x-y)/(x+y)=3 则(x+2y)/(6x-7y)等于
(x-y)³(x-y)²(y-x)等于多少
1、x(x-y)(x+y)-x(x+y)^2