已知a^5+b^5=(a+b)(a^4-a^3b=a^2b^2-ab^3+b^4)
请分解因式x^8+x^6+x^4+x^2+1
已知a^5+b^5=(a+b)(a^4-a^3b=a^2b^2-ab^3+b^4)
请分解因式x^8+x^6+x^4+x^2+1
x^8+x^6+x^4+x^2+1
=(x^2-1)(x^8+x^6+x^4+x^2+1)/(x^2-1)
=(x^10-1)/(x^2-1)
=(x^5+1)(x^5-1)/(x^2-1)
=(x+1)(x^4+x^3-x+1)(x-1)(x^4+x^3+x^2+x+1)/(x^2-1)
=(x^4+x^3-x+1)(x^4+x^3+x^2+x+1)
采纳下哈 谢谢
结果还是一样的