6(x-y)^3(y-x)^2
1.((y+2x)(-2x+y)+4(x+2y)^2)/3y 2.(2(x-y)^3-8(x-y)^2(x+y)+6y(
计算:(3x-4y)-[-(2y+x)+(x-3y)]-6x
先化简,在求值:(x-y)²+(3x-2y)(2x+y)-x(6x-y)
(x-y)(x-2y)-(3x-2y)(x-3y)
5/12[-4/3(x-y)^3] *(x+y)^2 * (-x-y)^3 * 5/6(y-x)^2
[(x-2y)^2-2(x+y)(3x-y)-6y^2]÷2x
2(x-y)+3(x+y)2-5(x-y)-8(x+y)2-(x-y)
(X-3Y)(X+3Y)-(X+2Y)(X-4Y)-(2X-Y)2的平方
(3x^3y^2+6x^2y^3)/(x+2y)
[(x+y)^3(x-y)^-2]^2(x+y)^-6
已知xy=2,x-y=3,求(x+y)(x-y)-y^2-(6x^2y-2xy^2)/2y的值.
已知xy=-2,x-y=3,求(x+y)(x-y)-y平方+(x-y)平方-(6x2y-2xy平方)/2y的值