CBSE > Class 09 > Mathematics | CBSE Board | Homework Help

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If x square+2kn+4=0 has root x=0 find the value of k

Posted by Anand Kumar Patel 1 year, 5 months ago

CBSE > Class 09 > Mathematics

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2+2 kitne hote hai

Posted by Ajay Yadav 1 year, 5 months ago

CBSE > Class 09 > Mathematics

5 answers

Piru Singh 1 year, 5 months ago

Two circles of ready 5 cm and 3 cm in the sector 2 and the distance between centres is 4 cm find the length of the common car

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Shourya Sharma 1 year, 5 months ago

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Dollymochi'S Girl 1 year, 5 months ago

What a question 😂

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Dona Mathew 1 year, 5 months ago

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If a=3+√5/2, then find the value of a^2+1/a^2

Posted by Garvit Chauhan 1 year, 5 months ago

CBSE > Class 09 > Mathematics

3 answers

Shreedhar Bhise Bhise 1 year, 5 months ago

Bhag idhrse

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Krushna Solanke 1 year, 5 months ago

a= 2 3+ 5∴ a 1= 3+ 52On rationaliging the denominator , we get , a 1= (3+ 5)(3− 5) 2(3− 5)= 9−5 6−2 5= 4 6−2 5= 2 3− 5Also, (a+ a 1) 2 =a 2 + a 2 1+2 Substituting the values of a  = a 1, We get , `( 2 3+ 5+ 2 3− 5) 2 =(a 2 + a 2 1+2) ∴a 2 + a 2 1+2=( 2 3+ 5+3− 5) 2 =(3) 2 =9 ∴a 2 + a 2 1=9−2=7.

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Dollymochi'S Girl 1 year, 5 months ago

a= 2 3+ 5 ∴ a 1 = 3+ 5 2 On rationaliging the denominator , we get , a 1 = (3+ 5 )(3− 5 ) 2(3− 5 ) = 9−5 6−2 5 = 4 6−2 5 = 2 3− 5 Also, (a+ a 1 ) 2 =a 2 + a 2 1 +2 Substituting the values of a  = a 1 , We get , `( 2 3+ 5 + 2 3− 5 ) 2 =(a 2 + a 2 1 +2) ∴a 2 + a 2 1 +2=( 2 3+ 5 +3− 5 ) 2 =(3) 2 =9 ∴a 2 + a 2 1 =9−2=7.

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In a mathematics test given to 15 students, the following marks ( out of 100) are recorded {[41,39,48,52,46,62,54,40,96,52,98,40,42,52,60 ]} find mean , median, mode of this data

Posted by Rj K 1 year, 5 months ago

CBSE > Class 09 > Mathematics

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Find the value of 1/3-√8 - 1/√8-√7 + 1/√7-√6 - 1/√6-√5 + 1/√5-2

Posted by Ananya Garg 1 year, 5 months ago

CBSE > Class 09 > Mathematics

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The sides of a triangular plot are in a ratio of 6 : 7 : 8 and its perimeter is 420m. Find its area.

Posted by Samruddhi Parik 1 year, 5 months ago

CBSE > Class 09 > Mathematics

5 answers

Samruddhi Parik 1 year, 5 months ago

The answer 20 is not the area

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Ajeet Yadav 1 year, 5 months ago

Thanks 🙏

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Lakshyasingh Singh 1 year, 5 months ago

Half yearly exam paper òuestion and answers

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Khushi Khushi 1 year, 5 months ago

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Ayush Raj 1 year, 5 months ago

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In the given figure ab||cd and o is the midpoint of ad show that ∆aob is congruent ∆doc , o is the mid point of bc

Posted by Harshit Khanna 1 year, 5 months ago

CBSE > Class 09 > Mathematics

2 answers

Ayush Raj 1 year, 5 months ago

Congruent sas

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Taniya Yadav 1 year, 5 months ago

4185 volume sphre

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PQRS is a square and ABC=90 AP=BQ=CR, prove BAC=45

Posted by Anuradha Singh 1 year, 5 months ago

CBSE > Class 09 > Mathematics

3 answers

Radhika ... 1 year, 5 months ago

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Krishna Yadav 1 year, 5 months ago

2+2

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Anmol Kumar 1 year, 5 months ago

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Posted by Ankit Kumar 1 year, 5 months ago

CBSE > Class 09 > Mathematics

5 answers

Nagappa Varthur 1 year, 5 months ago

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Azaj Khan 1 year, 6 months ago

What is the smallest co prime number

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Azaj Khan 1 year, 5 months ago

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Himanshu Saroj 1 year, 5 months ago

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Drishti Tomar 📚📒✍️ 1 year, 5 months ago

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square root of 3?

Posted by Shreya Sengar 1 year, 6 months ago

CBSE > Class 09 > Mathematics

2 answers

Ambika Sharma 1 year, 6 months ago

1.732

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Garvit Varshney 1 year, 6 months ago

1.73205080576...

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4+4=

Posted by Rana Ji 1 year, 6 months ago

CBSE > Class 09 > Mathematics

5 answers

Account Deleted 1 year, 5 months ago

eight

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Ambika Sharma 1 year, 6 months ago

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Shivam Kumar 1 year, 6 months ago

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Dhaval Agrawal 1 year, 6 months ago

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6 can subtracted 5 time from 28

Posted by Vivek Raj 1 year, 6 months ago

CBSE > Class 09 > Mathematics

3 answers

Naman Bansal 1 year, 4 months ago

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Ambika Sharma 1 year, 6 months ago

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Pawar Mrunal 1 year, 6 months ago

6*5=30 hence 28-30= -2

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Ajay lives in Delhi. The city of Ajay's father in laws residence is at Jaipur is 600 km from Delhi Ajay used to navel He used to buy cheap items from Delhi and sale at Jaipur and also buying cheap items from Jaipur and sale at Delhi Once From Delhi to Jaipur in forward journey he covered 2x km by train and the rest y km by taxi this 600 km partly by train and partly by car But, while returning he did not get a reservation from Jaipur in the train. So first 2y km he had to travel by tax and the rest x km by Train From Delhi to Jaipur he took 8 hrs but in returning it took 10 hrs. 2x km y km JAIPUR Delhi x km Zy km 600 km 1. Write the above information in terms of equation. 2. Find the value of x and y? 3. Find the speed of Taxi? 4. Find the speed of Train?

Posted by Akshatha Jv 1 year, 6 months ago

CBSE > Class 09 > Mathematics

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(3125/243)-4/5

Posted by Bhupendar Gidwani 1 year, 6 months ago

CBSE > Class 09 > Mathematics

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Two circles of radii 5 cm and 3 cm intersect at two points and the distance between their centres is 4 cm. Find the length of the common chord.

Posted by Alankrita Arya 1 year, 6 months ago

CBSE > Class 09 > Mathematics

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Which of the following of the origin is_________

Posted by Rithish Kumaran 1 year, 6 months ago

CBSE > Class 09 > Mathematics

1 answers

Arshdeep Kaur 1 year, 3 months ago

Where abscissa and ordinate intersect with each other is known as origin

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Sankhya rekh means

Posted by Drashti Joshi 1 year, 6 months ago

CBSE > Class 09 > Mathematics

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Garvit Varshney 1 year, 6 months ago

Google krke dekh lo

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Ex 6.2 6 th sum

Posted by Harini Harini 1 year, 6 months ago

CBSE > Class 09 > Mathematics

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0.83458456764 is ____________.

Posted by Sridhar Rathour 1 year, 6 months ago

CBSE > Class 09 > Mathematics

3 answers

Vishesha Sinha 1 year, 5 months ago

Irrational number

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Samruddhi Parik 1 year, 5 months ago

Irrational number

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Pawar Mrunal 1 year, 6 months ago

Irrational number

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Types and properties of quadrilateral

Posted by Yashi Kumar 1 year, 6 months ago

CBSE > Class 09 > Mathematics

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60006×37169

Posted by Rithish Kumaran 1 year, 6 months ago

CBSE > Class 09 > Mathematics

1 answers

Garvit Varshney 1 year, 6 months ago

Calculator mein calculate krle bhai

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Summary for lesdon tissue

Posted by Kanishgha P 1 year, 6 months ago

CBSE > Class 09 > Mathematics

1 answers

Kalaga Thaman 1 year, 6 months ago

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The circumference of the base of 10m high conical tent is 44 m calculate the length of Canvas used in making the tent if width of Canvas is 2m. (use π=22/7)

Posted by Prathamesh Pawar 1 year, 6 months ago

CBSE > Class 09 > Mathematics