-6x-y-7x+6x-2y-10x+8y+x+6x-8y的值

【2(x-y)(x-y)(x-y)-8(x-y)(x-y)(x+y)+6y(x-y)(x-y)]/2(x-y)(x-y) -6x-y-7x+6x-2y-10x+8y+x+6x-8y的值 -8(2x-y)-{7x-[6x+2y-(10x-8y)]}等于多少? 3(x-y)^2-7(x-y)+8(y-x)^2+6(y-x)合并同类项. 求几个方程组的答案 ｛2x+y=2 {3x-y=7 x=?y=?{x+2y=50 {3x=2y+6 x=?y=?{x+y=40 {10x+8y=370 x、y=?{x+y=5.8 {y=3x+0.6 x=?y=? [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 【2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2】/2(x-y)^2= (3x-4y)(5x-4y)-(7x-8y)(6y-5x) 6x^2(x-y)-10y(y-x)^2-2(y-x) 因式分解 4x-3y/x-2y÷6y-8x/y-2x 若(x-y)/(x+y)=3 则(x+2y)/(6x-7y)等于 {6(x-y)-7(x+y)=21 {2(x-y)-5(x+y)=-1 计算：(x-y)^7÷(y-x)^6+(-x-y)^3÷(x+y)^2 2(y-x)的平方-7(x-y)+6(x-y)-3(y-x)的平方 计算(x-y)^7÷(y-x)^6+9-x-y)^3÷(x+y)^2 81/8*(-x-y)^6*(x-y)^3*4/9(x+y)^4*(y-x)^2 x,y 满足x(x-2)-y(y-6)=-10,求x,y的值 1 x²y-3xy²2 2x(2x-y)+y(y-2x)3 -6x(m-2n)+12(2n-m)4 3(y-x)²-(x-y)³5 4a²-366 (x-2y)²-x²7 4x³y+4x²y²+xy³8 (x+y)²-2m(x+y)+m²9 x²-9x+1810 -8x²-10x-3