优课网
首页
数学
语文
英语
化学
物理
政治
历史
生物
首页
> 解方程:1x-1+x2-3xx2-1=-2.-数学
解方程:1x-1+x2-3xx2-1=-2.-数学
题目简介
解方程:1x-1+x2-3xx2-1=-2.-数学
题目详情
解方程:
1
x-1
+
x
2
-3x
x
2
-1
=-2.
题型:解答题
难度:中档
来源:昆明
答案
方程两边都乘(x+1)(x-1),
得(x+1)+x2-3x=-2(x+1)(x-1),
解得:x=1或-
class="stub"1
3
.
经检验:x=-
class="stub"1
3
是原方程的解.
上一篇 :
Rather than________to the pa
下一篇 :
There are many things that I
搜索答案
更多内容推荐
Some high officers were punished by law only because they were _______ what didn’t belong to them.A.
解方程:3x-2=2-xx-2-数学
计算:.-八年级数学
计算:.-八年级数学
Cynthia is not ashamed of what she does, even if she _____ doing something wrong. [ ] A. keeps up B.
(-xy3)2的计算结果是:()A.xy5B.x2y6C.-x2y6D.x2y5-八年级数学
短文改错。Dear Alice,I have just got some good news to tell to you. I win a national prize for painting l
Having noticed that she was followed by someone, she stopped and looked at the shop window, _____to
如果用换元法解方程x2-1x-3xx2-1+2=0,设y=x2-1x,那么原方程可化为()A.y2-3y+2=0B.y2+3y-2=0C.y2-2y+3=0D.y2+2y-3=0-数学
Attention, please! ________ for your luggage on the train or the bus![ ]A. Break outB. Turn outC. Wa
The stories of Guo Mingyi are really moving. __________ he is the most moving and respectable man I
用换元法解方程(xx+2)2-5(xx+2)+6=0-数学
Scientific researches show that to _________ a language one had better often get exposed to it.A.ack
I'd like to have these documents _______ in a minute. [ ]A. sorting outB. sorted out C. to be s
已知,则的值为()A.B.C.2D.-八年级数学
下列方程不是整式方程的是()A.22x2-12x=1B.0.2x2-0.4x3=0C.x2+15=3D.1x2+x=2-数学
We can_____skills from social practice activities.[ ]A. lost B. gained C. kept D. took-高一英语
It is surfing on the Internet late into the night that my getting up late.[ ]A. sticks to B. leads t
解方程:x2-2x-2=3x2-2x-数学
关于x的方程x2-(5k+1)x+k2-2=0,是否存在负数k,使方程的两个实数根的倒数和等于4?若存在,求出满足条件的k的值;若不存在,说明理由.-数学
解方程:x2=6x2-x+x-1-数学
I make no apologies for the way I have _____myself over the years and I have no regrets. [ ]A. behav
The volcano________in 1946 after one hundred and twenty years of silence.[ ]A. explodedB. burstC. er
若解分式方程2xx+1-x+1x=a-1x2+x产生增根,则a的值为()A.-1或2B.1或2C.0或3D.0或-3-数学
We should give students more chances to _______ the problems in their daily lives.A.deal withB.end u
— How about her songs?— Very well, and she can also dance. She is _______ a singer.A.more thanB.bett
The train had not come yet and the man ______ his watch anxiously.A.focused onB.glanced atC.watchedD
Practising Chinese kungfu (功夫)can not only ____ one’s strength, but also develop one’s character.A.b
Stay away from Lynch.He’s a liar.You’ll be cheated if you don’t __________. [ ]A. break outdenB. wat
It may not rain; but you’d better take an umbrella ______.A.in returnB.in needC.in caseD.in fact-高一英
The hotel ____ me $50 for a single room during one night.A.tookB.costC.chargedD.paid-高二英语
解方程:xx+1+1=2x+1x.-数学
若关于x的方程2x+mx-2=1的解为正数,求m的取值范围.-数学
用换元法解方程x2-3x+8x2-3x+1=5,如果设x2-3x+1=y,那么原方程可化为关于y的一元二次方程的一般式为______.-数学
如图,点A、B在数轴上,它们所对应的数分别是-4,,且点A、B到原点的距离相等,求x的值。-九年级数学
We are going to do some shopping. Willyou _ us? [ ]A. take part inB. join in C. joinD. take-高三英语
The Bull team _____ the football match and they _____ much experience in playing football. [ ]A. gai
解方程x2+x+1=2x2+x时,如果设y=x2+x,那么原方程可化为()A.y2+y-2=0B.y2-y+2=0C.y2+y+2=0D.y2-y-2=0-数学
When the woman was told that her husband had a car accident, her mind _____.A.ended upB.made senseC.
Featuressuch as height, weight, and skin colour____ from individual to individual and from face to f
She_________shyly at the young fellow from behind her fan.[ ]A. glancedB. glimpsedC. gazed D. copied
The price of beer __________ from 50 cents to $ 4 per liter during the summer season. [ ]A. alteredB
They _____decorating their new house in blues and yellows and hoped to finish it soon. [ ]A. set abo
短文改错。 假定英语课上老师要求同桌之间交换修改作文,请你修改你同桌写的以下作文。文中共有10 处语言错误,每句中最多有两处。错误涉及一个单词的增加、删除或修改。增加-高三英语
It`s already 10 o`clock. I wonder how it that she was two hours late on such a short trip.A.came ove
My father quittedto make himself a cup of tea.A.readingB.readC.to readingD.to read-高二英语
I _____ it as a basic principle of the company that suppliers of raw materials should be given a fai
解方程(组):(1)13(x-1)2=3;(2)2x2-4x-1=0;(3)6x2-x-12=0;(4)x2-6x-391=0;(5)x2+x+2=3x2+x;(6)解方程组:x2+y2=102x-y
Workers were celebrating after the world's longest water diversion tunnel(引水隧道)was _____in nort
The boy is used to obeying his mother's order,and neverher. [ ]A. distributeB. contribute C. di
返回顶部
题目简介
解方程:1x-1+x2-3xx2-1=-2.-数学
题目详情
答案
得(x+1)+x2-3x=-2(x+1)(x-1),
解得:x=1或-
经检验:x=-