分解因式:x15+x14+x13+…+x2+x+1.

发布时间:2021-02-22 05:47:02

分解因式:x15+x14+x13+…+x2+x+1.

网友回答

∵x16-1=(x8)2-1=(x8+1)(x8-1)
=(x8+1)[(x4)2-1]=(x8+1)(x4+1)(x4-1)
=(x8+1)(x4+1)(x2+1)(x2-1)
=(x8+1)(x4+1)(x2+1)(x+1)(x-1),
∴原式=(x
======以下答案可供参考======
供参考答案1:
x^15+X^14+X^13+……+x^2+X+1=(x^15+X^14)+(x^13+x^12)+(x^11+x^10)+.....+(x+1)
=x^14(x+1)+x^12(x+1)+x^10(x+1)+....+(x+1)
=(x+1)(x^14+x^12+x^10+...+x^2+1)
=(x+1)[x^12(x^2+1)+x^8(x^2+1)+x^4(x^2+1)+(x^2+1)]
=(x+1)(x^2+1)(x^12+x^8+x^4+1)
=(x+1)(x^2+1)[x^8(x^4+1)+(x^4+1)]
=(x+1)(x^2+1)(x^4+1)(x^8+1)
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