x²-2mx+m²-1=0
问题描述:
x²-2mx+m²-1=0
答
(x-m+1)(x-m-1)=0
x=m+1
x=m-1
x²-2mx+m²-1=0
(x-m+1)(x-m-1)=0
x=m+1
x=m-1