有關a4b4的精選大全

當a=-2時,(b-a)(a+b)(a2+b2)-(a4+b4)的值為
問題詳情:當a=-2時,(b-a)(a+b)(a2+b2)-(a4+b4)的值為_____.【回答】-32【解析】先化簡再把a=-2帶入求值.【詳解】:解:(b-a)(a+b)(a2+b2)-(a4+b4)=(b2-a2)(a2+b2)-(a4+b4)=(b4-a4)-(a4+b4)=-2a4∵a=-2,∴原式=-2×(-2)4=-32.故*為:-32.【點睛】此...
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