(-5x-1/3y)(3/5x-3/4y+2).使用初一的方法解

因式分解(x-2y)(x-3y)+(x-4y)(x-5y)+（x-3y)(x-5y)+(x-2y)(x-4y) 化简[(3x+4y)^2-(2x+y)(2x-y)+(-x+y)(5x-y)]除以-2y,其中x=-1,y=1 （x+y-5)*（x+y-5)+（x-y+3)=0 x*x-y*y （5x-3y)(3y+5x)-(4y-3x)(3x-4y) 已知:3x-5y=0,求x/y,x-y/y,x-y/x 5/4(x+y)(-x-y)^3*[-4/3(x-y)]*[-3/5(y-x)^2] （5x+3y)(3y-5x)-(4x-y)(4y+x)= 5x^3y(x-y)^3-10x^4y^3(y-x)^2因式分解 5x^3y(x-y)^3-10x^4y^3(y-x)^2 (3x-4y)(5x-4y)-(7x-8y)(6y-5x) 5X^3Y(X-Y)-10X^4Y^3(Y-X)^2因式分解 (x-y)/(x+y)=3求( 3x-2y-1)/(x+y-5) 4(x-y)-3(x-y)=9 5(x-y)+2(x-y)=11 3(x+y)-4(x-y)=11,2(x-y)+5(x+y)=27 （x+y）^6/(x+y)^4-(x-y)^5/(x-y)^3 化简 .. (2x-y)(3x-4y)-2(x-y)(2x-5y)简便运算 3(x+y)+2(x-y)=36 4(x+y)-5(x-y)=2 （x-y）^3×（y-x）^4+（x-y）^2×（y-x）^5