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The given polynomial is Q(r)=px^2+5x+r It is also given that (x-2) and (x-1/2)are the factor of Q(x) which means that Q (2)=0 and Q(1/2) =0 Let us first substitute Q(2)=0 in Q(x)=px^2+5x+r as shown below : =Q(r)=px^2+5x+r =Q(2)=p(2)^2+5(2)+r = 0=p(4)+10+r = 0=4p+10+r =4p+r=-10 ...........(1) Now substitute Q(1/2)=0in Q(x)=px^2+5x+r as shown below: =Q(x)=px^2+5r+r =Q(1/2)=p(1/2)+5(1/2)+r = 0 =p/4+5/2+r = 0 =p+5(2)+r(4)/4 = 0 =p+10+4r = p+4r= -10 ...........(2) Now subtracting the equations (1) and (2) we get = (4p - p) +(r -4r) = -10+10 = 3p - 3r =0 = 3p = 3r = p = r Hence p = r is proved

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Slope of a velocity time graph gives a) the distance b) the displacement c) the acceleration d) the speed

Posted by Kamya Arora 3 years, 8 months ago

CBSE > Class 09 > Science

3 answers

Sambit Kumar Das 3 years, 8 months ago

The displacement

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Kanu Choudhary 3 years, 8 months ago

The acceleration

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Navjot Ghuman 3 years, 8 months ago

The distance

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The numerical ratio of displacement to distance for a moving object is a)always less than 1 b)always equal to 1 c)always greater than 1 d)equal or less than 1

Posted by Kamya Arora 3 years, 8 months ago

CBSE > Class 09 > Science

2 answers

Kanu Choudhary 3 years, 8 months ago

Equal or less

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L.Kashe Linus 3 years, 8 months ago

Obtion d

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Slope of distance time graph gives the value of - a) displacement b)speed c)velocity d)acceleration

Posted by Kamya Arora 3 years, 8 months ago

CBSE > Class 09 > Science

2 answers

Sambit Kumar Das 3 years, 8 months ago

Speed

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Mehebub Rahman 3 years, 8 months ago

Speed

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Arun goes from station A to Station B covering distance of 10km.Then he returns back from station B to station A again covering distance of 10km.Then

Posted by Kamya Arora 3 years, 8 months ago

CBSE > Class 09 > Science

0 answers

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Sneha wanted to write a story

Posted by Urvashi Gulati 3 years, 8 months ago

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

0 answers

ANSWER

If the side of a cubical watermelon is equal to the diameter of a spherical watermelon and they are to be stacked in boxes, then which one would occupy more space than the other?

Posted by 8303 Amritanjay Singh 3 years, 8 months ago

CBSE > Class 09 > Mathematics

0 answers

ANSWER

I have an activity on the topic "best out of waste" for environment day, any suggestions on what to do?

Posted by Nella L 3 years, 8 months ago

CBSE > Class 09 > Social Science

0 answers

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I am pretty soon going to have a speaking test so what could be a good self introduction speech?

Posted by Priyum Halder 3 years, 8 months ago

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

1 answers

Suhani Saini 3 years, 8 months ago

I am giving my introduction you can corporate and change some lines. Good morning My name is Suhani Saini I am class 9 from army public school my father name is Hemant Kumar he's an army . And my mother name is Poonam Saini she is IPS OFFICER and I have a brother also his name is Parth Saini he is in also my school but in 5th class he is so noughty but cute. My strength is my parents and my weakness is to drive something but I regular practice to become my weakness my strength . Now you can question .

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Name the phenomenon which causes one crystal of potassium permaganate to turn a beaker of water purple

Posted by Harish Nithish 3 years, 8 months ago

CBSE > Class 09 > Science

2 answers

Pt Arnav Sharma 3 years, 8 months ago

Diffusion The intermixing of particle of two or more different substances on their own

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Ishita Sharma 3 years, 8 months ago

Diffusion

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When you heat ice, its temperature rises, but as soon as the ice starts to melt, the temperature stays constant until all the ice has melted. This happens because all the heat energy goes into breaking the bonds of the ice's crystal lattice structure

Posted by Harish Nithish 3 years, 8 months ago

CBSE > Class 09 > Science

1 answers

Pt Arnav Sharma 3 years, 8 months ago

When we heat ice its temperature keeps on rising but as soon as it starts melting then the heat energy is absorbed by particles of ice to overcome forces of attraction between them and that heat which absorbed know as latent heat of fusion

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What is hydrogen

Posted by T Chandrahas 3 years, 8 months ago

CBSE > Class 09 > Science

1 answers

Shilpa Jain 3 years, 8 months ago

Hydrogen is the most abundant chemical substance in the nature and it is the lightest element .Hydrogen is present as a gas at the normal temperature and pressure.

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Would you agree that the distribution of cultivated land is unequal in palampur? Do you find a similar situation for india? Explain

Posted by Shraiyaa Premkumar 3 years, 8 months ago

CBSE > Class 09 > Social Science

1 answers

Meera Rai 3 years, 8 months ago

MCQ

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How was resolvet personality in contrast to bought she become

Posted by Garvit Khunteta 3 years, 8 months ago

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

0 answers

ANSWER

What is people Militia

Posted by Aryan Raj 3 years, 8 months ago

CBSE > Class 09 > Social Science

0 answers

ANSWER

How to draw animal cell easily

Posted by Ayub Khan Ayub Khan 3 years, 8 months ago

CBSE > Class 09 > Science

0 answers

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I am having debate competition on topic success is more important than happiness give me some ideas

Posted by Aadarsh Rathore 3 years, 8 months ago

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

1 answers

Suhani Saini 3 years, 8 months ago

Happiness is more important than success: There is no doubt that success is a very important part of life, but happiness is a priceless emotion. In fact, it is believed that people who are happy achieve much more than those who keep a serious, sober demeanour.

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What was marreillaise who compased it

Posted by Ankitpal Singh 3 years, 8 months ago

CBSE > Class 09 > Social Science

2 answers

Kreetina Rk 3 years, 7 months ago

Marseilleise was a patroitic song. It was composed by a French poet Rager Isle de

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Souvik Bhattacharjee 3 years, 8 months ago

Marallise is the national anthem of France. It was composed by the Jacobian Club

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What are the Different between Evelyn Glennie and Bismillah Khan

Posted by 9F Rizwana 3 years, 8 months ago

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

0 answers

ANSWER

Write one article on any science related topic?

Posted by Divyanshi Goyal 3 years, 8 months ago

CBSE > Class 09 > Science

0 answers

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Do all NCERT blue questions and back questions in scince register of chapter 1 5 8 ?

Posted by Divyanshi Goyal 3 years, 8 months ago

CBSE > Class 09 > Science

0 answers

ANSWER

For any substance,why does the temperature remain constant during the change of heat?

Posted by Avanish A 3 years, 8 months ago

CBSE > Class 09 > Science

3 answers

Pt Arnav Sharma 3 years, 8 months ago

During the change of state of matter the supplied heat remains constamt because it is being utilised by the particles of matter to overcome the force of attraction

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Avanish A 3 years, 8 months ago

Thanks for the answer

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Akshra Akshu 3 years, 8 months ago

due to the latent heat as the heat supplied to increase the temperature of the substance is used up to transform the state of matter of the substance hence the temperature stays constant.

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Map works

Posted by Kirannm Kvdrdo 3 years, 8 months ago

CBSE > Class 09 > Social Science