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若x²-y²-x+y=(x-y)*A,则A=__________.
若x²-y²-x+y=(x-y)*A,则A=__________.
人气：358 ℃　时间：2020-06-07 10:51:29
解答
答：
x^2-y^2-x+y
=(x-y)(x+y)-(x-y)
=(x-y)(x+y-1)
=(x-y)*A
所以：A=x+y-1
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