−2
勒数学里向，负二，又叫负两，是离原点两隻单位个负整数，写成−2或者-2[1][2]，是2个加法逆元、相反数，是最大个负偶数。除开少数讨论整环素元个情况，一般性负二弗算素数[3]。
参考
[编辑]- ↑ Runesson Kempe, Ulla, Anna Lövström, and Björn Hellquist. Beyond the borders of the local: How “instructional products” from learning study can be shared and enhance student learning. International Journal for Lesson and Learning Studies (Emerald Group Publishing Limited). 2018, 7 (2): 111-123.
- ↑ Rick Billstein, Shlomo Libeskind, and Johnny W. Lott（2010）．A Problem Solving Approach to Mathematics for Elementary School Teachers ．Pearson Education, Inc．
- ↑ Can negative numbers be prime?. primes.utm.edu.
箇篇文章內容忒少哉，儂要是畀佢修改搭補加內容便最好哉。