请问这个式子如何继续化简下去?
2个回答
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a^3(c-b)+b^3(a-c)+c^3(b-a)
=a³(c-b)+b³[(a-b)+(b-c)]+c³(b-a)
=a³(c-b)-b³(b-a)-b³(c-b)+c³(b-a)
=(a³-b³)(c-b)+(c³-b³)(b-a)
=(a-b)(a²+ab+b²)(c-b)-(c-b)(c²+bc+b²)(a-b)
=(a-b)(c-b)(a²+ab+b²-c²-bc-b²)
=(a-b)(c-b)[(a²-c²)+(ab-bc)]
=(a-b)(c-b)[(a+c)(a-c)+b(a-c)]
=(a-b)(c-b)(a-c)(a+b+c)
=a³(c-b)+b³[(a-b)+(b-c)]+c³(b-a)
=a³(c-b)-b³(b-a)-b³(c-b)+c³(b-a)
=(a³-b³)(c-b)+(c³-b³)(b-a)
=(a-b)(a²+ab+b²)(c-b)-(c-b)(c²+bc+b²)(a-b)
=(a-b)(c-b)(a²+ab+b²-c²-bc-b²)
=(a-b)(c-b)[(a²-c²)+(ab-bc)]
=(a-b)(c-b)[(a+c)(a-c)+b(a-c)]
=(a-b)(c-b)(a-c)(a+b+c)
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