(a得2次方+4a+4)分之a的平方-4
=[(a+2)(a-2)]/(a+2)^2
=(a-2)/(a+2)
猜你喜欢
- 1选择恰当的单词或词语,完成短文 I come from New York.It is in the 1__of the United States.It is one of the largest cities in our country
- 2400米跑步比赛,跑道宽为1米时,起跑线应依次提前多少米?如果跑到宽是1.2米呢?
- 3表示看的词语只写一字回头去看
- 4一张环形铁片,外圆半径是6厘米,内圆半径是4厘米,它的面积是多少平方厘米?
- 5Are you going to attend the meeting to be held next Sunday?
- 6小丽、小红、小芳称体重,两个两个一起称,小丽和小红重54千克小红和小芳重56千克小丽和小芳重52千克
- 7桃花源记、陈涉世家、岳阳楼记的总结
- 8一个长方体形状的儿童游泳池,长40m宽14m,深1.2m,现在要四壁和池底贴上面积为0.16平方米的正方形瓷砖,一共需要多少块?
- 9有一个正方体木块,把它分成2个长方体之后,表面积增加了36平方厘米.这个木块原来的表面积是多少平方厘米
- 10I told him about that i____ he came back.