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求解三道分解因式的题!

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求解三道分解因式的题!
(a+b)²-(3a-1)² X^5(X-2)+X²(2y-x) a²(x-y)²+2a(X-y)^3+(X-Y)^4
求解三道分解因式的题!
(a+b)²-(3a-1)²
=﹙a+b+3a-1﹚﹙a+b-3a+1﹚
=﹙4a+b-1﹚﹙b-2a+1﹚
X^5(X-2)+X²(2-x)
=x²﹙x-2﹚﹙x³-1﹚
=x²﹙x-1﹚﹙x-2﹚﹙x²+x+1﹚
a²(x-y)²+2a(X-y)^3+(X-Y)^4
=﹙x-y﹚²[a²+2a﹙x-y﹚+﹙x-y﹚²]
=﹙x-y﹚²﹙x-y+a﹚²