a^3n-1+a^2n-1 因式分解
问题描述:
a^3n-1+a^2n-1 因式分解
a^3n-1+a^2n-1 因式分解
答
a^3n-1+a^2n-1
=(a^n-1)(a^2n+a^n+1)+(a^n-1)(a^n+1)
=(a^n-1)[(a^2n+a^n+1)+(a^n+1)]
=(a^n-1)(a^2n+2*a^n+2)