﹙m²+2m﹚²-2m²-4m+1因式分解

问题描述:

﹙m²+2m﹚²-2m²-4m+1因式分解

上式可以化简为﹙m²+2m﹚²-2(m²+2m)+1
令m²+2m=t
所以式子就是(t-1)²
将m²+2m=t代入