.麻烦写出过程...1.(m+1)(m-1)(m²-1)2.(2m+n)(2m-n)

问题描述:

.麻烦写出过程...
1.(m+1)(m-1)(m²-1)
2.(2m+n)(2m-n)

1.(m+1)(m-1)(m²-1)=(m²+m-m-1)(m²-1)=(m²-1)(m²-1)=(m²-1)² 或 =m4次方-2m²+12.(2m+n)(2m-n)=4m²+2mn-2mn-n²=4m²-n²