[(2x—y)(2x+y)—y(y—6x)]除以2x=多少

【2(x-y)(x-y)(x-y)-8(x-y)(x-y)(x+y)+6y(x-y)(x-y)]/2(x-y)(x-y) x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2 [(x+y)的平方—(x+y)(x—y)]除以2y怎么算 计算：(x—y)^7÷(y—x)^6+(—x—y)^3÷(x+y)^2 [(2x—y)(2x+y)—y(y—6x)]除以2x=多少 3(x+y)—4(x—y)=4 { (x+y)/2+(x—y)/6=1 2(x-y)/3—x+y/4=1 6(x+y)—4(2x-y)=16 3(x+y)—4(x-y)=4,(x+y/2)+(x-y/6)=1.解方程组 化简y(x+y)+(x+y)(x-y)-x^2 1.20y(2y-x)²与5x(x-2y)平方的公因式是—— 2.分解因式(x+y)(x-y)-(x+y)² 已知y=y(x)的导数y',y‘’存在,且y=y(x)的反函数为x=x(y),试用y',y''表示(d^2x)/dx^2 —（y''）/(y')^3 若x+y分之x-y=3,求式子x+y分之5(x-y)—2(x-y)分之x+y的值 若x-y分之x+y=3,求式子x+y分之5(x-y)—2（x-y）分之x+y的值 (x+y)(x-y)-(x-y)^2如题 (x+y)(x-y)-(x-y)^2 x²-2x+y²+6y+10=0,求—9(x+y)²+(3x-2y)(2y+3x)的值 —2x+5(x+2y)—(x—3y) 3x+2(y-x)-(-x-4y) (x-2y)-(y-3—2x+5(x+2y)—(x—3y) 3x+2(y-x)-(-x-4y)(x-2y)-(y-3x) y等于二y分之2x平方—2y的平方.x/y=? 计算:(x-y)^2*(y-x)^2*(x-y)^6