CBSE > Class 10 > Mathematics | CBSE Board | Homework Help

Let the number at the ten's place be x and that at the one's place be y. Number obtained = 10x + y The sum of the digits in a two-digits number is 9. .....(I) The number obtained by interchanging the digits exceeds the original number by 27. 10y+x-(10x+y)=27 9(y-x)=27. Y-x=3 .......(ll) Adding (I) and (II) 2y=12 and y=6 x = 3. Hence thr required no is 36

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Dawn To Dusk Twilight Classes 1 year, 6 months ago

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Which of the following is not irrational? (a) (2 – √3)2 (b) (√2 + √3)2 (c) (√2 -√3)(√2 + √3) (d)27√7

Posted by Adarsh Kohli 1 year, 6 months ago

CBSE > Class 10 > Mathematics

2 answers

Muskaan Syed 1 year, 6 months ago

Because (√2-√3) (√2+√3) gives formula a^2-b^2=(a+b) (a-b). So, (√2) ^2-(√3) ^2 = 2-3 = -1. If in a/b form -1/1.Hence proved that option (c) is rational

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Muskaan Syed 1 year, 6 months ago

(c)

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Which book is best for practice extra questions

Posted by Mayank Singh 1 year, 6 months ago

CBSE > Class 10 > Mathematics

3 answers

Muskaan Syed 1 year, 6 months ago

RD Sharma

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Aashiya Khan 1 year, 6 months ago

RD sharma and ncert examplar

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Dishant Kumar 1 year, 6 months ago

RD Sharma

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√2x-√3y=0 √3x-√8y=0

Posted by Muskaan Syed 1 year, 6 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

2x-y=2

Posted by Khakchang Tripura 1 year, 6 months ago

CBSE > Class 10 > Mathematics

0 answers

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Assertion: If one zero of the zeroes of the quadratic polynomial is the negative of the other zero then it has no linear term. Reason: If alpha and beta are the zeroes of a quadratic polynomial ax² + bx + c, a≠0 then alpha + beta = -b/a

Posted by Dev Singh 1 year, 6 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

2 is prime number

Posted by Amrit Kumar 1 year, 6 months ago

CBSE > Class 10 > Mathematics

2 answers

Aashiya Khan 1 year, 6 months ago

Yes

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Riya Singru 1 year, 6 months ago

Yess

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12abx²-(9a²-8b)x-6ab by Shri dhara charya formula

Posted by Isha Sharma 1 year, 6 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

Find the zeros : x^2 + 6

Posted by Hamiz Kamal 1 year, 6 months ago

CBSE > Class 10 > Mathematics

1 answers

Saurabh Yadav 1 year, 6 months ago

0,6

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sundaram joined a company for a fixed salary per month after few months the management felt happy with his work and multiplied his salary by some n times this happened every few month and his salary kept getting multiplied and he reached's salary of 36k every time the managment in creased the salary by prime number of time only and his inital salary was 5k what is the maximum increment he got in his salary

Posted by Vaishnavi .R 1 year, 6 months ago

CBSE > Class 10 > Mathematics

0 answers

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Chapter 1 real numbers mind map

Posted by Bharti Lodhi 1 year, 6 months ago

CBSE > Class 10 > Mathematics

2 answers

Abhishek Gupta 1 year, 6 months ago

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Ansh Singh 1 year, 6 months ago

2+2

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If the no. Of zeroes 3 and 5 find the quadratic polynomial

Posted by Ashish Kumar Jatav 1 year, 6 months ago

CBSE > Class 10 > Mathematics

4 answers

Yukti - 1 year, 6 months ago

zeroes are 3 and 5 Sum of zeroes= 3+5=8 Product of zeroes=3*5=15 Quadratic equation=x²-(sum of zeroes)x+product of zeroes=0 x²-8x+15=0

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Sudhir Kumar 1 year, 6 months ago

x^-3x+5

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Sachin Yadav 1 year, 6 months ago

Ratio Koti

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Mayank Saarthak 1 year, 6 months ago

X²-7x+15

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The sum of the first 15 multiples of 8

Posted by Zubi Nadeem 1 year, 6 months ago

CBSE > Class 10 > Mathematics

1 answers

Saksham Pal 1 year, 6 months ago

9600

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Find the quadratic polynomial the sun of whose zeros is -5 and their product is 6

Posted by Siyan Tarapatla 1 year, 6 months ago

CBSE > Class 10 > Mathematics

4 answers

Yukti - 1 year, 6 months ago

Quadratic polynomial=x²-(sum of zeroes)x+product of zeroes=0 x²-5x+6=0

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#Student _ 1 year, 6 months ago

Easy bro

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Mayank Saarthak 1 year, 6 months ago

X²+5x+6

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Secret Thakur 1 year, 6 months ago

x^2+5x+6

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56,43 of lcm

Posted by Jatin Kumar 1 year, 6 months ago

CBSE > Class 10 > Mathematics

1 answers

Muskaan Syed 1 year, 6 months ago

2408

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4 x square - 4af + (mein A2 b square is equal to zero

Posted by Ankita Singh 1 year, 6 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

Find the polynomial zeroes are 3+1by square root 6 and 3+1 by square root

Posted by Narayan Narayan 1 year, 6 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

Find a quatratic polynomial x²-3x²+x+1are a-b ,a and a+b then find the value a.

Posted by Apurva Prasad 1 year, 6 months ago

CBSE > Class 10 > Mathematics

1 answers

Riya Singru 1 year, 6 months ago

a=5

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ANSWER

Divide 2x²+x-20 by x+3 and verify division algorithm.

Posted by Apurva Prasad 1 year, 6 months ago

CBSE > Class 10 > Mathematics

0 answers

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12a²bc-9acx²+6ab²c by -3ac

Posted by Maria Nawab 1 year, 6 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

3/2-2/2

Posted by Utkarsh Mishra 1 year, 6 months ago

CBSE > Class 10 > Mathematics

3 answers

Mahaswetha Prathvirajan 1 year, 6 months ago

1/2

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Bhuvana.A Bhuvana 1 year, 6 months ago

0.5

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Bhuvana.A Bhuvana 1 year, 6 months ago

What's the question sir

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x²-2(k+1)x+k²=0

Posted by Jeet Rathi 1 year, 6 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

Prove 6.1 theorem

Posted by Khushi Chandekar 1 year, 6 months ago

CBSE > Class 10 > Mathematics

2 answers

Utkarsh Mishra 1 year, 6 months ago

Book hai to app pr kya ker raha

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Madhur Sardiwal 1 year, 6 months ago

Book mein h dekhle

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bx/a-ay/b+a+b=0 and bx-ay+2ab=0

Posted by Ananya Admane 1 year, 6 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

(2+√3) (2-√3) is a ______ number

Posted by Jasnoor Maan 1 year, 6 months ago

CBSE > Class 10 > Mathematics

4 answers

Jigyasa Sen 1 year, 6 months ago

(2+√3)(2-√3) here we can apply the identity of (a+b)(a-b) = a²-b² So, (2+√3)(2-√3) = (2)²-(√3)² Which means , 4-3 =1 [ here (√3)² = √3×√3 = 3 ] Also,1 is a rational no. as it is in the form of p/q. [ 1/1 ] Hence, (2+√3)(2-√3) is a rational number.

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Niraj Kumar 1 year, 6 months ago

Rational number

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Srijoy Roy 1 year, 6 months ago

Rational number

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Rudrakshi Thakur 1 year, 6 months ago

Ans is 1

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ANSWER

The decimal expansion of 3/8 is