12(x-2y)²-17(x-2y)³+13(2y-x)²-10(2y-x)³
求因式分解(x-y)²-2(x-y)³和(x+y)(x-y)-x(x-y)
(x-y)的四次方(x-y)-2(x-y)²(y-x)³等于?
12(x-2y)²-17(x-2y)³+13(2y-x)²-10(2y-x)³
(x-2y)²+(2x-4y)(x+y)+(x+y)²
已知方程组2x-y=10,x+2y=11,求(2x-y)³-(2x-y)²(x-3y)的值
已知x²-y²=10,求[(x+y)³-2y(x+y)²-4(x+y)]÷(x+
计算4(x+y)^5(x-y)^4÷[2(x+y)³*(y-x)²]
1/2 x²y·( )=2x³y-x²y²
(x-y/x+2y)³
若|x+2y-1|+y²+4y+4=0,求(2x-y)²-2(2x-y)(x+2y)+(x+2y)&
(3x-y)²-2x(4x-5y)-(x+2y)²
已知4x²+y²-4x-6y+10=0求(2/3x(√9x)+(y²√x/y³)