Phân tích đa thức x^4 + 1 thành nhân tử

By Trang Ánh Nam -

Phân tích đa thức x4 + 1 thành nhân tử. Giúp mình với ạ?

Giải:

=x4+2x2+1-2x2

=(x2+1)22x2

=(x2+1)2-(x)2

=(x2+x+1)(x2-x+1)

 

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