问题
解答题
计算:(1)(a-1)(a2+a+1)
(2)(m-1)(m+1)(m2-1)
答案
(1)(a-1)(a2+a+1)=a3-1;
(2)(m-1)(m+1)(m2-1)
=(m2-1)(m2-1)
=m4-2m2+1.
计算:(1)(a-1)(a2+a+1)
(2)(m-1)(m+1)(m2-1)
(1)(a-1)(a2+a+1)=a3-1;
(2)(m-1)(m+1)(m2-1)
=(m2-1)(m2-1)
=m4-2m2+1.