首先b2/b-a相当于负的b2/a-b
所以原式化为a2/a-b减去b2/a-b
化简为(a2-b2)/a-b
(a+b)(a-b)/a-b
原式等于a+b
猜你喜欢
- 1轮船在静水中航行速度是a km/h,已知水流速度是b km/h,则轮船在逆水中航行s km,所需的时间是_ h.
- 2I am going (shopping ) with my mum this this afternoon.对括号内提问
- 3When he was a child,he left home.Until it became the home of old talent,although his accent has not changed,but his fami
- 4一个零件形状大小如下图.算一算,他的体积是多少立方厘米?表面积是多少平方厘米?
- 5甲乙两车分别从AB两地出发,相向而行,相遇时甲车行了全程的3\5.已知甲车从A地到B
- 6I am reading a book ( ) the history of the world
- 7科学老师用什么诗句希望我们要敢于实验
- 8葡萄每千克6元 梨每千克2.5元 苹果每千克5元 西瓜每千克3元 香蕉每千克2元
- 9当电路中电阻变大时,电压和电流分别怎么变?(分串并联来解释,一定要解释)
- 10晁盖,吴用本人智取生辰纲其“智”体现在哪些方面?