4(x-y)3-8x(x-y)2 x^4-1 a^2-b^2-4a+4b 因式分解 4(x-y)^3-8x(x-y)^2x^4-1a^2-b^2-4a+4b 前面有点小错误

x^3+2x^2y-4x-8y 81/8*(-x-y)^6*(x-y)^3*4/9(x+y)^4*(y-x)^2 4x-3y/x-2y÷6y-8x/y-2x 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) 因式分解：a(x-y)^2+b(y-x)^3 4(x-y)^2+8(y-x)(x+y)1.a(x-y)^2+b(y-x)^3 2.4(x-y)^2+8(y-x)(x+y) 化简(2x/(x+y)-4x/(y-x))/8x(x^2-y^2)得 (x-y) (x-2y)+(x+2y) (x-3y)-2(x-3y) (x-4y)= x²/xy-x/y 3x/4x+y - x-2y/4x+y (1-y/y+x)÷x/y²-x² (x+3y-4)(2x-y) （y-x)+x(x-y)^3-(y-x)^4 因式分解 计算（2x-3y)(x+4y)-(3x+y)(x-2y)（2x-3y)(x+4y)-(3x+y)(x-2y) 因式分解(x-2y)(x-3y)+(x-4y)(x-5y)+（x-3y)(x-5y)+(x-2y)(x-4y) 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) 9y=3x-(x-1),4(x+y)-(2x+4)=8y (x-y-x+y/4y^2)(x+y-x+y/4x^2)/(3(x+y)-x-y/8xy)拜托各位大神(x-y-x+y/4y^2)(x+y-x+y/4x^2)/(3(x+y)-x-y/8xy)详细, 1.（（y+2x)(-2x+y)+4(x+2y)^2)/3y 2.（2(x-y)^3-8(x-y）^2(x+y)+6y(x-y)^2）/2（x-y)^2 1.(x^3-x^2-4x+1)/(x^2-3x+2)-(x^3-2x^2-9x+21)/（x^2-5x+6）+（x^2-3x+8）/（x^2-4x+3）2.{(x^2)/（x-y)}*{y/(x+y)}-{(x^4y)/(x^4-y^4)}÷{（x^2/x^2+y^2）^2} (2x+y)(2x-3y)+x(2y+y) 2a(x-y)-4b(x-y)