(x-y)(x-y)2(y-x) (x+2y-?)(x-2y+?)

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(x-y)(x-y)2(y-x) (x+2y-?)(x-2y+?)

(x-y)(x-y)2(y-x) (x+2y-?)(x-2y+?)
(x-y)(x-y)2(y-x)
(x+2y-?)(x-2y+?)

(x-y)(x-y)2(y-x) (x+2y-?)(x-2y+?)
x^2(x-y)+y^2(y-x)
=x^2(x-y)-y^2(x-y)
=(x-y)(x^2-y^2)
=(x-y)(x-y)(x+y)
=(x-y)^2(x+y)

我才6年级

第一题的2是平方还是别的,第二题有问号就更不知道了。

k . gv h