1996*2004-1999^2
=(2000-4)*(2000+4)-(2000-1)^2
=2000^2-4^2-(2000^2-2*2000+1)
=2000^2-4^2-2000^2+2*2000-1
=-16+4000-1
=3983
猜你喜欢
- 1由古诗《咏鹅》编改成故事要怎么编
- 2电场中两个电势不同的等势能面能不能相交?请说明理由
- 3they'll move in the day after tomorrow
- 413和26的最大公因数是_,最小公倍数是_.
- 5She likes him play basketball这句话对不对?
- 6I am glad that you can keep yourself busy,it is good to be busy,don't you think so?甚么意思
- 7PH=9的醋酸钠溶液,水解产生的氢氧根是多少?水电离产生的氢氧根是多少?
- 8已知函数f(x)=ax^2+4x+b(a、b∈R,且a<0)
- 9做梦 梦见飞碟!
- 10There are some orange trees on the farm.改单数