2002的3次方-2001乘2002乘2003=

问题描述:

2002的3次方-2001乘2002乘2003=

2002的3次方-2001乘2002乘2003
=2002*(2002^2-2001*2003)
=2002*[2002^2-(2002-1)(2002+1)]
=2002*(2002^2-2002^2+1)
=2002