解方程:t²-4t=5
问题描述:
解方程:t²-4t=5
答
t²-4t=5
t²-4t-5=0
(t-5)(t+1)=0
t=5或t=-1
相关推荐
- 两组同学跳绳,甲组有25人,平均每人跳80下,乙组有20人,平均每人比甲乙组的平均数多5个,求两组同学每人平均跳多少下算术法要是用方程的话把解方程的过程写完整哈
- 如图,C为线段AB上一点,且AC=2BC,AC的四分之一比BC小5(1)求AC,BC的长(1)求AC,BC的长(2)点P从A点出发,以一个单位/秒的速度在线段AB上向B点运动,设运动时间为t秒(t
- 英语选择题6个.需要回答时带解释.1.He has already spent () she gave him.A.how B.what C.which D.on what2.Write down the names of three countries.Any three will ()A.be B.do C.get D.make3.A:Do you mind getting up early?B:()A.I don't like either B.No,I don't mind it C.Yes,I don't hate it D.Yes,I like it4.The hotel () a shoe-cleaning service for its guests.A.takes B.brings C.provides D.makes5.A week's rest will () you a lot of good.A.make B.look C.do D.become6.It () unbel
- 请帮我解决下面的英语作业吧从B栏中找出A栏中各句的应答语.A栏( )1.How are you?( )2.Hello!Is that Paul?( )3.Where’s My sweater,Mom?( )4.Would you like to come to my birthday party?( )5.What day is it today?( )6.Happy New Year!( )7.Can I help you?( )8.Could I use your dictionary?( )9.Jack,your T—shirt is very cool.( )10.What’s the date today?B栏A.Of course.Here you are.B.It’s September 21st.C.I’m very well,thank you.D.Yes,speaking.E.The same to you.F.Yes,please.I’d like a redG.Thank
- 设数列{an}满足:a1=5,an+1+4an=5,(n∈N*)(I)是否存在实数t,使{an+t}是等比数列?(Ⅱ)设数列bn=|an|,求{bn}的前2013项和S2013.
- 英语作业(1),懂得就来帮忙做下单选题 第1题 (2.0) 分 A、where does he live B、where he lives C、 where he does live D、he lives where 第2题 (2.0) 分 Trains can more passengers than planes.A、get B、bring C、send D、carry 第3题 (2.0) 分 You needn’t have it .You can repair it yourself.A、 repairs B、repairing C、repairing D、repaired 第4题 (2.0) 分 I have never seen beautiful coat.A、so B、such C、so a D、such a 第5题 (2.0) 分 The Great Wall more than 2000 years old.A、is B、be C、has D、 was 第6题 (2.0) 分
- 解方程|2x|=1.1.当2x大于或等于0时,原方程可化解为2x=1,所以x=2分之1;2.当2x小于0时,原方程可化为-2x=1,所以x=2分之1.所以原方程的解是x1=-2分之1,x2=2分之一.依照例题解方程|3x+1|=5
- 用否定前缀的形容词造句1.This is a “No Parking”area.________________________________2.This chair is too small.3.___________________________________4.The boy didn’t tell the truth.__________________________________5.The restaurant is quite near here.___________________________________6.I don’t like him because he is rude._____________________________7.I have never seen such heavy snow here.___________________________________8.Water is very important to us.________
- 一汽车以15m/s的速度行驶,司机突然发现前方50m处有一障碍物,司机立刻采取了制动措施,若汽车(包括司机)的总质量为4t,为避免汽车与障碍物相撞,汽车受到的制动力至少为?(忽略其他阻力).
- 书面表达.李勤的美国笔友劳拉(Laura)问她喜欢什么运动.假如你是李勤,请根据下面的问题提示,写一篇70词左右的电子邮件.告诉劳拉你最喜欢的运动.信的开头已给出,不计入字数内.要求:1.What's your favorite sport?2.Why do you like the sport?3.When do you often do it?4、Are you good at it?5.What's your new term‘t pian?采用be going to 结构.开头:Dear LauraHow are you?You asked me about my favorite sport in your last letter.Now let me tell you something about it?...9月8日必须给出、谢谢各位!
- 趋肤深度怎么计算?计算公式是什么?然后公式中各个字母代表的是什么?
- x*60%=5%(2600-x)