999^2-1003*997
=(1000-1)^2-(1000+3)(1000-3)
=1000^2-2000+1-1000^2+9
=-1990
猜你喜欢
- 1数列1/5,3/5,1,7/5……的第11项a11=
- 2I don't want to spend too much time_____ you _____ this thing.A. on quarrling;for B.in quarrling with:about C.to quarrel
- 3食物所含的营养物质中,______、_______、______等小分子物质能够直接被人体吸收
- 4she will come back at the end of this year.(保持原句意思)
- 5BBF科学八年级(下)周测月考评论卷(5)
- 6铝与酸、碱反应时,铝与氢气的电子关系如何?
- 7把下例各式因式分解 x^2+x-2 x^2+2x-3 x^2+2x+1 x^2-4x+4 x^2-3x=2 x^3-2x^2+x x^4-x^2
- 8i want to know which bank in china i can use in canada.这句话说的对吗?如果错了怎么改?
- 950mlNa2co3,na2so4的混合溶液,加入过量Bacl2溶液后,得到14.51g沉淀,用过量稀硝酸处理
- 10同义句转换填空 the coat coat me 20 yuan.(l__20yuan__the coat)