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问两道分解公因式的题
3a²-3b²
5x²y-10xy²+5y三次方
人气:254 ℃ 时间:2020-07-22 04:05:14
解答
3a²-3b²
=3(a²-b²)
=3(a+b)(a-b)
5x²y-10xy²+5y³
=5y(x²-2xy+y²)
=5y(x-y)²
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