把a²-4ab+3b²+2bc-c²因式分解
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把a²-4ab+3b²+2bc-c²因式分解
把a²-4ab+3b²+2bc-c²因式分解
把a²-4ab+3b²+2bc-c²因式分解
a2-4ab+3b2+2bc-c2=a2-4ab+4b2-b2+2bc-c2=a2-4ab+4b2-(b2-2bc+c2)
=(a-2b)2-(b-c)2=(a-b-c)(a-3b+c)