因式分解:25a^(n+2)-10a^(n+1)+a^n
问题描述:
因式分解:25a^(n+2)-10a^(n+1)+a^n
答
25a^(n+2)-10a^(n+1)+a^n
=25*a^2*a^n-10*a*a^n+a^n
=a^n(25a^2-10a+1)
=a^n(5a-1)