(x³-2y²)(-2y²-x³)=?
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?
1/2 x²y·( )=2x³y-x²y²
已知x²-y²=10,求[(x+y)³-2y(x+y)²-4(x+y)]÷(x+
已知方程组2x-y=10,x+2y=11,求(2x-y)³-(2x-y)²(x-3y)的值
计算4(x+y)^5(x-y)^4÷[2(x+y)³*(y-x)²]
已知方程组2x+y=6 x-3y=1,求7y(x-3y)²-2(3y-x)³的值
已知4x²+y²-4x-6y+10=0求(2/3x(√9x)+(y²√x/y³)
已知|x+y+2|+(2x-3y-1)²=0 求 ⑴x、y的值 ⑵2x³-x²-3y
若|x+2y-1|+y²+4y+4=0,求(2x-y)²-2(2x-y)(x+2y)+(x+2y)&
因式分解 -5x³y(x-y)³+20y【x²(y-x)】²
若|x+y-1|+(x-y-2)²=0,求代数式(x+2y)(x-2y)-(2x-y)(-y-2x)的值.