6x^2-12xy+6y^2/3x-3y 谢谢帮帮忙,要理由!1
2个回答
原式=(6x²-12xy+6y²)/(3x-3y)
=6(x²-2xy+y²)/[3(x-y)]
=2(x-y)²/(x-y)
=2(x-y)
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