[(2x+y)的2次方-y(y+4x)-2x]÷2x=

{(z+y)(x-y)-(x-y)的2次方+2y(x-y)}除以4y 4y(y-x)的2次方-6y(x-y)三次方 因式分解 (y-x)²(x-y)+(x-y)的三次方+2(x-y)²(y-x) (y-2x)×(2x-2y)的3次方×(y-2x)的4次方 x-y+x+y分之2y的2次方 4+12(x--y)+9(x--y)的2次方 4+12(x-y)+9(x-y)的2次方 (x-y)3次方.(x-y)2次方.(y-x) (x-y)的5次方-(y-x)的2次方, x的4次方+x的2次方y的2次方+y的4次方 [(2x+y)的2次方-y(y+4x)-2x]÷2x= 已知x=y+2,求[(x+y)(x-y)-(x-y)的2次方+2y(x-y)]÷4y的值 (x+y)的平方(x-y)-(x+y)(x-y)的平方 18-2x的4次方 (x-y)的2次方-2(x-y)+(x-y)-5(x-y) (x-y)的四次方(x-y)-2(x-y)²(y-x）³等于? [(x+y)的2次方-(x+y)(x+3y)-4y的2次方]除以2y其中x=-2,y=1/2 若x+y=-6,求[(x+y)的2次方-(x-y)的2次方+2y(y-x)]乘以1分之4y (x+y)的2次方-4(x平方-y平方)+4(x-y)的平方