约分:(x+y)² -z²分之x²-(y-z)²
人气：221 ℃ 时间：2020-01-29 13:44:16
解答
Tiamo_碓冰,你好： ［x²－（y－z）²］/［（x＋y）²－z²］.分母是（x＋y）²－z²,分子是x²－（y－z）²＝［（x＋y－z）（x－y＋z）］/［（x＋y＋z）（x＋y－z）］.用平方差公...
推荐
猜你喜欢
- 1．把R1、R2两个阻值不同的定值电阻接入电路中,已知R1两端的电压为U1,R2两端的电压为U2,通过R1、R2的电
- 5397除以一个素数,所得的余数是15,这个素数为什么是23?
- come down the corridor
- They are asked to write a diary in English(every other day).(PS.就括号里的内容提出问题)~
- 急求英语作文 The traffic in the city is getting worse
- 在⊙O中,P是弦AB上一点,且AP=3,PB=5,OP=2,求
- 用支字开头成语接龙
- Yu Xuan wants to go with me.She says," __7__we go there together?" "Sure!" I say.
