n*n-65n+636=0
问题描述:
n*n-65n+636=0
答
n²-65n+636=0
(n-53)(n-12)=0
n-53=0 n-12=0
n1=53 n2=12
答
n*n-65n+636=0
(n-12) (n-53)=0
解得n=12或n=53
答
因式分解(n-12)*(n-53)=0,得到解为12,53.