展开全部
123456789*987654321
=(555555555-432098766)(555555555+432098766)
=25*111111111²-432098766²
=25*111111111²-(444444444-12345678)²
=25*111111111²-16*111111111²+8*111111111*12345678-12345678²
=9*111111111²+8*111111111*12345678-12345678²
=9*111111111²+8/9*111111111²-8*111111111-(12345679-1)²
=10*111111111²-1/9*111111111²-8*111111111-12345679²+2*12345679-1
=10*111111111²-1/9*111111111²-8*111111111-1/81*111111111²+2/9*111111111-1
=10*111111111²-10/81*111111111²-70/9*111111111-1
=123456789876543210-10/81*12345678987654321-70*12345679-1
=123456789876543210-10/9*1371742109739369-864197530-1
=123456789876543210-10*152415789971041-864197531
=123456789876543210-1524157899710410-864197531
=123456789876543210
- 1524157899710410
- 864197531
=121932631112635269
=(555555555-432098766)(555555555+432098766)
=25*111111111²-432098766²
=25*111111111²-(444444444-12345678)²
=25*111111111²-16*111111111²+8*111111111*12345678-12345678²
=9*111111111²+8*111111111*12345678-12345678²
=9*111111111²+8/9*111111111²-8*111111111-(12345679-1)²
=10*111111111²-1/9*111111111²-8*111111111-12345679²+2*12345679-1
=10*111111111²-1/9*111111111²-8*111111111-1/81*111111111²+2/9*111111111-1
=10*111111111²-10/81*111111111²-70/9*111111111-1
=123456789876543210-10/81*12345678987654321-70*12345679-1
=123456789876543210-10/9*1371742109739369-864197530-1
=123456789876543210-10*152415789971041-864197531
=123456789876543210-1524157899710410-864197531
=123456789876543210
- 1524157899710410
- 864197531
=121932631112635269
已赞过
已踩过<
评论
收起
你对这个回答的评价是?
推荐律师服务:
若未解决您的问题,请您详细描述您的问题,通过百度律临进行免费专业咨询