﹙x-2y﹚²-4x+8y+4
(2x-y)²-4(x-y)(x+2y)
化简:(2x-y)²-4(x-y)(x+y)
计算 x+2y+﹙4y²/x-2y﹚+﹙4x²y/4y²-x²)
(x-2y)²+(2x-4y)(x+y)+(x+y)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(x^8-x^7y+x^5y^3-x^4y^4+x^3y^5-x^y^7+y^8)(x^2+xy+y^2)
x^8-x^7y+x^6y^2-x^5y^3+x^4y^4-x^3y^5+x^2y^-xy^7+y^8
(x+y)(x-2y)(x²-4y²) 其中x=8 y=-8 化简求值
已知x/y=2,求2x(x+y)-y(x+y)/4x²-4xy+y²
[(x+2y)(x-2y)-(x-2y)^2+8y(x+y)]除以4x=
(2x+y)²-y(y+4x)-8x等于?
x^2-y^2/x+y-4x(x-y)+y^2/2x-y,