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

As f(x)=2x2+5x+k So alpha+beeta=-5/2 as -co eff of x /coeff of xsquare So alpha*beeta=k/2 constant/ co eff of x square So now your equation is - (alpha +beta)square + alpha*beeta =21/4 So by replacing values (-5/2)square+k/2=21/4 25/4+k/2=21/4 Transpose 25/4 to rhs k/2=21/4-25/4 k/2=-4/4 k=-4/4*2 k=-2 I hope your doubt is cleared best of luck for future

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Find the zeroes of x^2+15x?

Posted by Abhipsa Behera 4 years, 5 months ago

CBSE > Class 10 > Mathematics

1 answers

Ayush Kumar Jha 4 years, 5 months ago

x^2+15x = x(x+15) Here, x=0 x+15=0 Therefore, zeroes are 0 , -15 I hope it will be helpfull

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What is Euclid's division

Posted by Manas Ranjan 4 years, 5 months ago

CBSE > Class 10 > Mathematics

2 answers

Abhipsa Behera 4 years, 5 months ago

In arithmetic, Euclidean division – or division with remainder – is the process of dividing one integer by another, in a way that produces a quotient and a remainder smaller than the divisor.

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Arjun Kumar Gupta 4 years, 5 months ago

According to Euclid's Division Lemma if we have two positive integers a and b, then there exist unique integers q and r which satisfies the condition a = bq + r where 0 ≤ r < b. That means, on dividing both the integers a and b the remainder is zero. ...

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Find all the zeroes of the polynomial 2x4 + 7x – 19x2 – 14x + 30, if two of its zeroes are √2, -√2

Posted by Parth Agarwal 4 years, 5 months ago

CBSE > Class 10 > Mathematics

1 answers

Amit Kumar 4 years, 5 months ago

2x⁴+7x-19x²-14x+30

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1.1 3 rd questions

Posted by Ayaan Beg 4 years, 5 months ago

CBSE > Class 10 > Mathematics

1 answers

Abhipsa Behera 4 years, 5 months ago

Ans:To do it systematically, find HCF of(616 and 32)= So, 616>32 616=32×19+8 32=8×4+0 So, HCF of 616 and 32 is 8(common HCF). Thus, the maximum number of columns is 8 in which they can march.

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prove that root2+root3 is an irrational number

Posted by Sriyanshi Sharma Sharma 4 years, 5 months ago

CBSE > Class 10 > Mathematics

1 answers

Sappy Bakshi 4 years, 5 months ago

Obviously as root2+root3 = root 5 which is irrational

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Best helpbook for English grammar

Posted by Money Singh 4 years, 5 months ago

CBSE > Class 10 > Mathematics

2 answers

Jasleen Gill 4 years, 5 months ago

Xam Idea Best book for English grammar for all the grades

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Md Ajaz 4 years, 5 months ago

Number system

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Ncert and exemplar is enough to score 100 in maths 10th boards

Posted by Money Singh 4 years, 5 months ago

CBSE > Class 10 > Mathematics

1 answers

Kartik Gupta 4 years, 5 months ago

Yes

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Find the HCF and LCM of 11008 and 7344 using fundamental theorem of arithmetic.

Posted by Deepanshu Saini 4 years, 5 months ago

CBSE > Class 10 > Mathematics

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Pz give fast my ans I need

Posted by Prabhjeet Kaur Dhillon 4 years, 5 months ago

CBSE > Class 10 > Mathematics

1 answers

Vivek Kumar 4 years, 5 months ago

Lol

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24 +3{16-2 (8-1)} +1

Posted by Prabhjeet Kaur Dhillon 4 years, 5 months ago

CBSE > Class 10 > Mathematics

3 answers

Anjali Shakya 4 years, 5 months ago

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Sappy Bakshi 4 years, 5 months ago

319

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Prashant Kumar 4 years, 5 months ago

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If sec theta =5/4 then verify tan theta/1+tan square theta =sin theta / sec theta

Posted by Preethika M 4 years, 5 months ago

CBSE > Class 10 > Mathematics

0 answers

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2x^2+x-1=0

Posted by Sanjay Meena 4 years, 5 months ago

CBSE > Class 10 > Mathematics

0 answers

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cos(90-theta)*sin(90-theta)/tan(90-theta)=sin^theta

Posted by Rohit Kumawat 4 years, 5 months ago

CBSE > Class 10 > Mathematics

0 answers

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(X)2+(6)2=14

Posted by Priyansh Dheer 4 years, 5 months ago

CBSE > Class 10 > Mathematics

1 answers

Rohit Kumawat 4 years, 5 months ago

(X)2 + 6(2) =14 First of all, we have to divided by 2 both sides (X)2 /2 + 6(2) /2 =14/2 Then we have, X +6 =7 X = 7-6 X = 1 Okay, then check (1)2 + 6(2) = 14 2 + 12 = 14 14 =14

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What is the formula of sum

Posted by Basanagouda Patil 4 years, 5 months ago

CBSE > Class 10 > Mathematics

1 answers

Basanagouda Patil 4 years, 5 months ago

Sn=n/2{a+a+(n-1)d}

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32(57)√45

Posted by Sameer Mandirkar 4 years, 5 months ago

CBSE > Class 10 > Mathematics

4 answers

Shruti Dwivedi 4 years, 5 months ago

1824√45

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Shruti Dwivedi 4 years, 5 months ago

1824/45

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Divyashree Nath 4 years, 5 months ago

1824√45

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Lavkush Pal 4 years, 5 months ago

1824✓45

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2x +4y=10

Posted by Ekanshi Kamra 4 years, 5 months ago

CBSE > Class 10 > Mathematics

3 answers

Ekanshi Kamra 4 years, 5 months ago

Yes

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Lavkush Pal 4 years, 5 months ago

2x+4y-10 X=2, y=4, -10

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Arjun Kotalwar 4 years, 5 months ago

Y=2 X=1

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Ex-3.2 Q-1

Posted by Rajat Sharma 4 years, 5 months ago

CBSE > Class 10 > Mathematics

2 answers

Rohit Kumawat 4 years, 5 months ago

Let number of boys who took part in the quiz = x Let number of girls who took part in the quiz = y According to given conditions, we have x + y = 10… (1) And, y = x + 4 ⇒ x – y = −4 … (2) For equation x + y = 10, we have following points which lie on the line For equation x – y = –4, we have following points which lie on the line We plot the points for both of the equations to find the solution. We can clearly see that the intersection point of two lines is (3, 7). Therefore, number of boys who took park in the quiz = 3 and, number of girls who took part in the quiz = 7. (ii) Let cost of one pencil = Rs x and Let cost of one pen = Rs y According to given conditions, we have 5x + 7y = 50… (1) 7x + 5y = 46… (2) For equation 5x + 7y = 50, we have following points which lie on the line For equation 7x + 5y = 46, we have following points which lie on the line We can clearly see that the intersection point of two lines is (3, 5). Therefore, cost of pencil = Rs 3 and, cost of pen = Rs 5

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Jasleen Gill 4 years, 5 months ago

Kindly provide more clarity

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Tha HCM and LCM of two numbers is 9 and 459 respectively. If one of the number is 27 then the other number is (1)

Posted by Prakash Ajanalkar 4 years, 5 months ago

CBSE > Class 10 > Mathematics