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If x=2+√3, Find the value of x^2+1/x^2

Posted by Gulfam Ahmed 4 years, 6 months ago

CBSE > Class 09 > Mathematics

1 answers

Preeti Dabral 4 years, 6 months ago

Given that

x = 2 + √3

1/x = 1/2 + √3

= 1 × (2 - √3)/(2 + √3) (2 - √3)

= (2 - √3)/(2^2 - √3^2)

= (2 - √3)/4 - 3

= (2 - √3)

Therefore ,

x^2 = (2 + √3)

= (2)^2 + (√3)^2 + 2 × 2 × √3

= 4 + 3 + 4√3

= 7 + 4√3

1/x^2 = (2 - √3)^2

= (2)^2 + (√3)^2 - 2 × 2 × √3

= 4 + 3 - 4√3

= 7 - 4√3

x^2 + 1/x^2

= (7 + 4√3) + (7 - 4√3)

= 7 + 4√3 + 7 - 4√3

= 7 + 7 + 4√3 - 4√3

= 14

ANSWER

Marketing

Posted by Tanish Riya 4 years, 6 months ago

CBSE > Class 09 > Other Subjects

1 answers

Tanish Riya 4 years, 6 months ago

(102)^3 (100+2)^3 (100)^2+(2)+3(100)(2)(100+2) Using identity (a^3+b^3+3ab(a+b) 1000000+8+600(100+2)=1000000+8+60000+1200=1061208

ANSWER

________ have their headquarters outside India but operates in multiple worldwide including those in India

Posted by Meet Patel 4 years, 6 months ago

CBSE > Class 09 > Information Technology (402)

1 answers

Taranpreet Kaur 4 years, 6 months ago

It is in your chapter. Find it. You have to find yourself.

ANSWER

1. Is zero a rational number? Can you write it in the form p q , where p and q are integers and q ≠ 0?

Posted by Ronak Regar 4 years, 6 months ago

CBSE > Class 09 > Mathematics

5 answers

Vinit Kumar 4 years, 6 months ago

Yes we can write 0/5,0/6,0/7 ........

Akshita Gupta 4 years, 6 months ago

Yes, 0is a rational no. And can be written in form of p/q , where p&q are integers and q is not equal to 0 Like 0/1, 0/4etc.

Anshpreet Kaur 4 years, 6 months ago

Yes

Aditya Modi 4 years, 6 months ago

Yes 0 is a rational no. and can be written in p/q form.

Agnimitra Majumder 4 years, 6 months ago

Yes, 0 is a rational number. It can be written in the form of p/q as 0/1, where q≠ 0

ANSWER

What is superscript?name the menu and option where it resides

Posted by Deo Kumar 4 years, 6 months ago

CBSE > Class 09 > Information Technology (402)

1 answers

Sia ? 4 years, 4 months ago

A superscript or subscript is a number, figure, symbol, or indicator that is smaller than the normal line of type and is set slightly above it (superscript) or below it (subscript). When you add a trademark, copyright, or other symbol to your presentation, you might want the symbol to appear slightly above the rest of your text. If you’re creating a footnote, you might also want to do this with a number.

ANSWER

4x+5

Posted by Shraddha Patil 4 years, 6 months ago

CBSE > Class 09 > Mathematics

2 answers

Vinit Kumar 4 years, 6 months ago

Yes it is

Ronak Regar 4 years, 6 months ago

1. Is zero a rational number? Can you write it in the form p q , where p and q are integers and q ≠ 0?

ANSWER

Which officials must be elected for any government to be called a Democracy?

Posted by Kanika Singh 4 years, 6 months ago

CBSE > Class 09 > Social Science

2 answers

Preeti Dabral 4 years, 6 months ago

The officials who have the majority of the votes and elected by the people can run a democratic government. People can vote for these officials and make them as their representatives, but before that, these officials should justify their eligibility for gaining mass votes.

Bhuvanisha Murugan 4 years, 5 months ago

The officials that are being elected by people.

ANSWER

Chapter 1 notes

Posted by Kunal Rajput 4 years, 6 months ago

CBSE > Class 09 > Information Technology (402)

0 answers

ANSWER

Eery rational number is

Posted by Kartik Singh 4 years, 6 months ago

CBSE > Class 09 > Mathematics

1 answers

Gayathri Nayak 4 years, 6 months ago

Is a real Number

ANSWER

It is considered by the present political thinkers that there is not even a single country which is a perfect democratic country how far do you agree with this statement express your views with suitable examples

Posted by Khushi Gupta 4 years, 6 months ago

CBSE > Class 09 > Social Science

0 answers

ANSWER

Factorise y^2-5y+6

Posted by Debanshi Saipriya 4 years, 6 months ago

CBSE > Class 09 > Mathematics

1 answers

Aditya Modi 4 years, 6 months ago

y square +(3+2) y+6 Y square +3y + 2y +6 So, y (y+3) +2 (y +3 ) is your answer...

ANSWER

In a right Triangle ABC right angle at C M is the midpoint of hypotenuse a b dot she is joined to M and produced to point the such that d m is equal to CM point D is joined to point B show that triangle ABC is congruent to triangle bmd second triangle angle DBC is a right angle 3 triangle ABC is congruent to triangle ACB for cm is equals to 1 upon 2 ab

Posted by Meenakshi Wadhwa 4 years, 6 months ago

CBSE > Class 09 > Mathematics

0 answers

ANSWER

What are the non-farm production activities taking place in your region?

Posted by Krishna Bindal 4 years, 6 months ago

CBSE > Class 09 > Social Science

1 answers

Kanika Singh 4 years, 6 months ago

Non farm production activities are as follows :- a) Small scale manufacturing b) Dairy c) Animal husbandry or rearing of animals d) Transportation e) small shops Hope you understand the answer and like it...

ANSWER

calculate the average speeds of your class we who have participated in 100m running race. Write a report

Posted by Sanjana I 4 years, 6 months ago

CBSE > Class 09 > Home Science

0 answers

ANSWER

What impression had the father left behind on the child's mind??

Posted by Manya Agarwal 4 years, 6 months ago

CBSE > Class 09 > English Lang & Lit. (184)

0 answers

ANSWER

How much year old margie

Posted by Anshika Kesharwani 4 years, 6 months ago

CBSE > Class 09 > English Lang & Lit. (184)

5 answers

Bhuvanisha Murugan 4 years, 5 months ago

11 yrs

Prince Kumar 4 years, 6 months ago

She is 11 years old

Aditya Modi 4 years, 6 months ago

11 years old and tommy 13 years old.

Agnimitra Majumder 4 years, 6 months ago

Margie was eleven years old.

Anmol Preet 4 years, 6 months ago

11 years

ANSWER

Show that 1.272727...can be expressed in the form p/q ,where p and q are integer and q≠0

Posted by Sonali Patel 4 years, 6 months ago

CBSE > Class 09 > Mathematics

1 answers

Mayank Kumar Modi 4 years, 6 months ago

Let, x=1.272727.... Now, 100x =127.272727... Now subtract100x=127.272727... -- x=1.272727... 99x =126 X=126/99 X=42/33 = 14/11

ANSWER

What are demerits of democracy? Has democracy any de merit?

Posted by Akshita Gupta 4 years, 6 months ago

CBSE > Class 09 > Social Science

1 answers

Preeti Dabral 4 years, 6 months ago

Demerits of democracy

Leaders keep changing in a democracy leading to instability.
Democracy is all about political competition and power play, leaving no scope for morality.
Many people have to be consulted in a democracy that leads to delays.

ANSWER

Factorise 27y³+125z³

Posted by Gshdbxb Hsgsvsg 4 years, 6 months ago

CBSE > Class 09 > Mathematics

1 answers

Gshdbxb Hsgsvsg 4 years, 6 months ago

Jjsjsbx

ANSWER

What is an effective communication?

Posted by Akshita Gupta 4 years, 5 months ago

CBSE > Class 09 > Computer Applications (165)

1 answers

Anshika Kesharwani 4 years, 6 months ago

Effective Communication is defined as the ability to convey information to another effectively and efficiently. Business managers with good verbal, nonverbal and written communication skills help facilitate the sharing of information between people within a company for its commercial benefit.

ANSWER

√2×2

Posted by Swathi Sri .S 4 years, 6 months ago

CBSE > Class 09 > Mathematics

5 answers

Mido Ratan 4 years, 6 months ago

4

Meenakshi Wadhwa 4 years, 6 months ago

2√2 is the right answer

Akshita Gupta 4 years, 6 months ago

2√2

Hilda Gifty 4 years, 6 months ago

The question is the answer too

Swathi Sri .S 4 years, 6 months ago

Pls answer

ANSWER

What is green revolution state its advantages and disadvantages?

Posted by Janhavi Alone 4 years, 6 months ago

CBSE > Class 09 > Social Science

1 answers

Trisha Kushwaha 4 years, 6 months ago

The late my date 1971 set it

ANSWER

There is some information about four countries based on their information half will you classify each of the countries like democratic under most rated are not secure against each of these

Posted by Chandan Kumar 4 years, 6 months ago

CBSE > Class 09 > Social Science

0 answers

ANSWER

What is the meaning of Je t'aime

Posted by Paarvi Parashar 4 years, 6 months ago

CBSE > Class 09 > French

2 answers

Janvi Chum 4 years, 4 months ago

Je t'aime = I like you

Arjun Lochen 4 years, 5 months ago

It means "I love/like you"

ANSWER

How to write khushi in germAn

Posted by Khyati Shankar 4 years, 6 months ago

CBSE > Class 09 > German

1 answers

Sameer Md 4 years, 6 months ago

Khuusshhii

ANSWER

Route12 ×rute 15

Posted by Vardaan Makkar 4 years, 6 months ago

CBSE > Class 09 > Mathematics

2 answers

Sundar Kumar 4 years, 6 months ago

6√5

Aditya Kumar 4 years, 6 months ago

√12 ×√15= =√180 answer is √180

ANSWER

On rationalising the denominator 2√11 we get

Posted by Pawan Kumar 4 years, 6 months ago

CBSE > Class 09 > Mathematics

0 answers

ANSWER

When I will withdraw my money

Posted by Swapna Nayak 4 years, 6 months ago

CBSE > Class 09 > Mathematics

0 answers

ANSWER

WHAT IS RADIOACTIVE RADIATION

Posted by Om Dwived 4 years, 6 months ago

CBSE > Class 09 > Science

5 answers

Sanket ... 4 years, 6 months ago

Radioactive decay is the process by which an unstable atomic nucleus loses energy by radiation. A material containing unstable nuclei is considered radioactive. Three of the most common types of decay are alpha decay, beta decay, and gamma decay, all of which involve emitting one or more particles or photons.

Parth Magar 4 years, 6 months ago

Radioactive decay is the process by which an unstable atomic nucleus loses energy by radiation. A material containing unstable nuclei is considered radioactive. Three of the most common types of decay are alpha decay, beta decay, and gamma decay, all of which involve emitting one or more particles or photons.

Bandar Gowtham Gowtham 4 years, 6 months ago

Ggh

Pal D. Pathak 4 years, 6 months ago

Radioactive decay is the process by which an unstable atomic nucleus loses energy by radiation. A material containing unstable nuclei is considered radioactive. Three of the most common types of decay are alpha decay, beta decay, and gamma decay, all of which involve emitting one or more particles or photons.

Manan Gulati 4 years, 6 months ago

Radioactive decay is the process by which an unstable atomic nucleus loses energy by radiation. A material containing unstable nuclei is considered radioactive. Three of the most common types of decay are alpha decay, beta decay, and gamma decay, all of which involve emitting one or more particles or photons.

ANSWER

Everything about nutern?

Posted by Shivanshu Mishra 4 years, 6 months ago

CBSE > Class 09 > Information Technology (402)

0 answers

ANSWER

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