化简 3(X-Y)²-4(X-Y)+7(X-Y)-6(X-Y)²
化简 3(X-Y)²-4(X-Y)+7(X-Y)-6(X-Y)²
因式分解:(x-y)(3x-7y)²-4(x-y)(x+y)²
化简:(2x-y)²-4(x-y)(x+y)
(3x-4y)(5x-4y)-(7x-8y)(6y-5x)
已知x,y满足x²+y²-4x+6y+13=0则(3x+y)²-(3x+y)(3x-y)的
(x-y)³+9(x-y)-6(x-y)²
(2x-y)²-4(x-y)(x+2y)
x^8-x^7y+x^6y^2-x^5y^3+x^4y^4-x^3y^5+x^2y^-xy^7+y^8
(x+y)²+x+y-6因式分解
(x+y)²+4(x+y)-5
因式分解:x²(x-y)+(y-x)
若x、y满足2x+y=6,x-3y=1,求7y(x-3y)²-2(3y-x)³的值