a²-b²/a²-3ab+2b² 怎么化简
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a²-b²/a²-3ab+2b² 怎么化简
a²-b²/a²-3ab+2b² 怎么化简
a²-b²/a²-3ab+2b² 怎么化简
分子与分母分别分解因式,约分.
原式=(a+b)(a-b)/[(a-b)(a-2b)]
=(a+b)/(a-2b).