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 ago

CBSE > Class 09 > Mathematics

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2+2 kitne hote hai

Posted by Ajay Yadav 1 year, 1 month ago

CBSE > Class 09 > Mathematics

5 answers

Piru Singh 1 year 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, 1 month ago

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Dollymochi'S Girl 1 year, 1 month ago

What a question 😂

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Dona Mathew 1 year, 1 month 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, 1 month ago

CBSE > Class 09 > Mathematics

3 answers

Shreedhar Bhise Bhise 1 year ago

Bhag idhrse

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Krushna Solanke 1 year 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, 1 month 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, 1 month 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, 1 month 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 Kunjal Parik 1 year, 1 month ago

CBSE > Class 09 > Mathematics

5 answers

Kunjal Parik 1 year, 1 month ago

The answer 20 is not the area

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Ajeet Yadav 1 year, 1 month ago

Thanks 🙏

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Lakshyasingh Singh 1 year, 1 month ago

Half yearly exam paper òuestion and answers

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Khushi Khushi 1 year, 1 month ago

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Ayush Raj 1 year, 1 month 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, 1 month ago

CBSE > Class 09 > Mathematics

2 answers

Ayush Raj 1 year, 1 month ago

Congruent sas

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Taniya Yadav 1 year, 1 month 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, 1 month ago

CBSE > Class 09 > Mathematics

3 answers

Radhika ... 1 year, 1 month ago

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Krishna Yadav 1 year, 1 month ago

2+2

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Anmol Kumar 1 year, 1 month ago

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Posted by Ankit Kumar 1 year, 1 month ago

CBSE > Class 09 > Mathematics

5 answers

Nagappa Varthur 1 year, 1 month ago

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Azaj Khan 1 year, 1 month ago

What is the smallest co prime number

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Azaj Khan 1 year, 1 month ago

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Himanshu Saroj 1 year, 1 month ago

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Drishti Tomar 📚📒✍️ 1 year, 1 month ago

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square root of 3?

Posted by Shreya Sengar 1 year, 1 month ago

CBSE > Class 09 > Mathematics

2 answers

Ambika Sharma 1 year, 1 month ago

1.732

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Garvit Varshney 1 year, 1 month ago

1.73205080576...

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4+4=

Posted by Rana Ji 1 year, 1 month ago

CBSE > Class 09 > Mathematics

5 answers

Account Deleted 1 year, 1 month ago

eight

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Ambika Sharma 1 year, 1 month ago

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Garvit Varshney 1 year, 1 month ago

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Shivam Kumar 1 year, 1 month ago

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Dhaval Agrawal 1 year, 1 month ago

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6 can subtracted 5 time from 28

Posted by Vivek Raj 1 year, 1 month ago

CBSE > Class 09 > Mathematics

3 answers

Naman Bansal 11 months, 3 weeks ago

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Ambika Sharma 1 year, 1 month ago

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Pawar Mrunal 1 year, 1 month 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, 1 month ago

CBSE > Class 09 > Mathematics

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(3125/243)-4/5

Posted by Bhupendar Gidwani 1 year, 1 month 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, 1 month ago

CBSE > Class 09 > Mathematics

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Which of the following of the origin is_________

Posted by Rithish Kumaran 1 year, 1 month ago

CBSE > Class 09 > Mathematics

1 answers

Arshdeep Kaur 11 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, 1 month ago

CBSE > Class 09 > Mathematics

1 answers

Garvit Varshney 1 year, 1 month ago

Google krke dekh lo

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Ex 6.2 6 th sum

Posted by Harini Harini 1 year, 1 month ago

CBSE > Class 09 > Mathematics

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0.83458456764 is ____________.

Posted by Sridhar Rathour 1 year, 1 month ago

CBSE > Class 09 > Mathematics

3 answers

Vishesha Sinha 1 year ago

Irrational number

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Kunjal Parik 1 year, 1 month ago

Irrational number

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Pawar Mrunal 1 year, 1 month ago

Irrational number

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Types and properties of quadrilateral

Posted by Yashi Kumar 1 year, 1 month ago

CBSE > Class 09 > Mathematics

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60006×37169

Posted by Rithish Kumaran 1 year, 1 month ago

CBSE > Class 09 > Mathematics

1 answers

Garvit Varshney 1 year, 1 month ago

Calculator mein calculate krle bhai

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Summary for lesdon tissue

Posted by Kanishgha P 1 year, 1 month ago

CBSE > Class 09 > Mathematics

1 answers

Kalaga Thaman 1 year, 1 month 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 Mrunal Pawar 1 year, 1 month ago

CBSE > Class 09 > Mathematics