mtk6797:数学问题(请写清过程)

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x^2-3ax+(2a+1)(a-1)

x^2-3ax+(2a+1)(a-1)
X^2-[(2a+1)+(a-1)]x+[2a+1][a-1]
=[x-2a-1][x-a+1]

原式=(x-(2a+1))*(x-(a-1))
=(x-2a-1)*(x-a+1)

(x-2a-1)*(x-a+1)