2x/(x-8y)(x+8y)-(x+8y)/ (x-8y)(x+8y)怎麼计算了 详细
2x/(x-8y)(x+8y)-(x+8y)/ (x-8y)(x+8y)怎麼计算了 详细
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)
计算:1/(x-y)-1/(x+y)-2y/(x^2+y^2)-4y^3/(x^4+y^4)-8x^7/(x^8+y^8
【2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2】/2(x-y)^2=
(x-y)^2+7(x+y)-11(x-y)^2-8(x+y),先化简.再求值
5(x-y)^2-(x-y)-8(x-y)^2-3(x-y)
1.((y+2x)(-2x+y)+4(x+2y)^2)/3y 2.(2(x-y)^3-8(x-y)^2(x+y)+6y(
x^8-x^7y+x^6y^2-x^5y^3+x^4y^4-x^3y^5+x^2y^-xy^7+y^8
计算:8x^2y^4(-3x/4y^2)/(-x^2y/2)
计算:[(x+¼y)+(x-¼y)](2x²-1/8y²)
计算 {2(x-y)的平方-8(x-y)的平方(x+y)+6y(x-y)的平方}÷2(x-y)的平方 等于
(x+2y)(x-2y)-(2y-x)(-2x-y)其中x=8,y=-8