[(x+y)^3]^6-3[(x+y)^3]^6X(x+y)^4X(-x-y)^2大写的X是乘号 小写的x是字母

3x(x-y)³-6y(y-x)² (3x-y)(3y+x)-(x-y)(x+y) 因式分解 （x-3y)(x+6y) [2(x-y)^5-8(x-y)^2(x+y)+6y(x-y)^2]÷2(x-y)^2[2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2]÷2(x-y)^2 3y/x*x-y*y+x/x*x-2xy+y*y+6y*y/x*x*x-x*x*y-xy*y+y*y*y等于多少? 3x的平方×（x-y)+6x(y-x) 因式分解3x^2(x-y)+6x(y-x) 【2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2】/2(x-y)^2= 因式分解：3xy(x-y)+6y(y-x) 2(2x+3y)(3x+2y)-(6x-y)(2x-5y) x+y/2+x-y/3=6,4(x+y)-3(x-y)=-20 {(x+y)/2+(x-y)/3=6 4(x+y)-3(x-y)=-20 4(x+y)-3(x-y)=-20,2/x+y+3/x-y=6 [12(x+y)^3+3(x+y)(x-y)^2]÷6(x+y) 2(x+y)-3(x-y)=1 6(x+y)+(x-y)=51 若(x-y)/(x+y)=3 则(x+2y)/(6x-7y)等于 (3x-4y)(5x-4y)-(7x-8y)(6y-5x) 4x-3y/x-2y÷6y-8x/y-2x