9x⁴-2x²y²+y⁴)÷(x+y)²÷(x-y)=?
{(x-y)²+(x+y)(x-y)}÷2x
2.(x+y)²(x-y)²-(x-y)(x+y)(x²+y²)
【(2x+y)²-y(y+4x)-8x】÷2x,其中x=100
已知2x-y=10,求代数式[(x²+y²)-(x-y)²+2y(x-y)]÷4y的值?
求因式分解(x-y)²-2(x-y)³和(x+y)(x-y)-x(x-y)
已知x²-y²=10,求[(x+y)³-2y(x+y)²-4(x+y)]÷(x+
先化简再求值 :[(x+2y)²-(x+y)(3x-y)-5y²]÷(2x),其中x=—2,y=5
(x-2y)²+(2x-4y)(x+y)+(x+y)²
(x-y)的四次方(x-y)-2(x-y)²(y-x)³等于?
计算4(x+y)^5(x-y)^4÷[2(x+y)³*(y-x)²]
若|x+2y-1|+y²+4y+4=0,求(2x-y)²-2(2x-y)(x+2y)+(x+2y)&
[x(x²y²-xy)-y(x²-x³y)]÷3x²y