(1加a)的三次方?

2025-03-01 04:09:35
推荐回答(2个)
回答1:

(1+a)的三次方
=1+2a的平方+a的三次方

回答2:

(1+a)³
=(a+1)²(a+1)
=(a²+2a+1)(a+1)
=a³+2a²+a+a²+2a+1
=a³+3a²+3a+1