At 15:40 : 2ac is 2*1*25

@sachinkumarsingh2518

3 жыл бұрын

Sir , what is this 2ac , i think it should be 4ac na ??, please reply..🙏

@mindfullmallu7511

2 жыл бұрын

@SARTHAK BORA 🤡

@mindfullmallu7511

2 жыл бұрын

@SARTHAK BORA 🤡

@arvind109singh

Жыл бұрын

@@sachinkumarsingh2518 it's a condition ig. Not a discriminate

@mr.tembhurne2977

Жыл бұрын

@@mindfullmallu7511 correct

Great Job sir. You are a real Hero! Thanks a Million times!

Amazing concepts!!! Thank you sir❤️

Sir very nice conceptual video ❤️

Thanku sir

Thankyou 💜 so much sir 🙏🏻

Thank you.

Thank you Sir🙏

Thank you so much sir

Thanks for your efforts, Sir.

@Endever10

Ай бұрын

Wlcm😊

You are using 125 instead of 25. So please pine a comment for confirmation..

@humairaalam969

Жыл бұрын

Yes isn't that a mistake ? Like c is supposed to be 25 i guess he used the value of d ..

RESPECTED SIR KINDLY CLARIFY ONE DOUBT IN X^3+5X^2+25X+125 2AC SHOULD BE 2*1*25 AND NOT 2*1*125.KINDLY CLEAR THE DOUBT. WITH REGARDS ROHIT SHARMA

@zoro3188

2 жыл бұрын

Your perception is correct sir made a little mistake their

@rayzoldyck8044

Жыл бұрын

nigga wrote a whole ass application lmao

hey can anyone share the descartes sign change rule video link

thank u sir❤

@soumadipranjanbiswas1779

Жыл бұрын

I wanted to know where is the "Descartes sign change rule" video ? Can you please help ?

why did we use b^2 - 4ac previously and now its b^2 - 2ac? What's the difference between the two?

@overexcitedladki23

Жыл бұрын

It's a condition...not a discriminant

Why is the Discriminant of the cubic equation (b^2-2ac) and not (b^2-4ac)? Please help.

@deekshitabora8280

2 жыл бұрын

Because that's not the DISCRIMINANT, it's just a condition.

@lazy_sorbet

2 жыл бұрын

There's nothing like b^2-2ac like quadratic equation,in cubic equation we have to compare b^2 to 2ac , if it is less then 2 imaginary roots and 1 real root. Else all roots are real.

Thank u sir🙏

At 8:01 shouldn’t the equation 3 be equal to -b ?

@vedantmishra3697

4 жыл бұрын

Yesss

@kanakh7775

3 жыл бұрын

yes sir told it in a different way, like b is negative so value is negative only.

Why we can take abcd as the roots instead of alpha gama bita?? Abcd = 3*3*3*3 B= 3 A=3

hi. Can anyone pls share the cubic equation part 3 link... The playlist has cubic equation part 3 but it has quadratic eqn lecture.

@Dev-jp4rn

9 ай бұрын

There is only 2 video of cubic eqn

Dear Sir, Good Morning At 8:40 , facing problems till the end of this question, because after putting the values in the equation, values doesn't satisfy the equation, please check once..

@ritikagaddellu7938

2 жыл бұрын

Nope..equation satisfies✅✅

@smitpatil1584

Жыл бұрын

b must be negative

What is the use of calculating the value of one root among the three roots in the last question? How will that help to solve the question further?

@sidharthnair881

Ай бұрын

Then you use that factor(E.g. if 1 is a root, (x-1) is a factor) and divide the whole cubic equation by this factor using long division method to get a quadratic equation. Then solve the quadratic to find the other 2 roots.

@therevealer672

27 күн бұрын

You can use synthetic division method to reduce the equation to quadratic and solve quadratic for other two roots.

If apna= beta= gamma= delta=3 Then this root must satisfy the equation of bi-quadratic mentioned here which is not! Can anyone suggest me if I am wrong anywhere ?

@saswatarouth1516

3 жыл бұрын

I think you have done something wrong in the calculations

@sachinkumarsingh2518

3 жыл бұрын

Answer of the eqn by putting x=1(let's say), its coming out to be equal to 16 instead of 0 & by putting X=2 , Eqn. equals to 1 , why so ????? Can anyone clarify this doubt ...

@amanvarma4839

10 ай бұрын

Wrong Calculation. It is satisfying. Putting x=3, eq=0

Hi Sir, Thanks for the series. I wanted to know where is the "Descartes sign change rule" video ?

@MaxwellNaradd

11 ай бұрын

Did you find it?

@soumadipranjanbiswas1779

11 ай бұрын

@@MaxwellNaradd no

🙏🙏

@soumadipranjanbiswas1779

Жыл бұрын

I wanted to know where is the "Descartes sign change rule" video ? Can you please help ?

At 4:48 how can denominator be equal to 4???

@rahulsinghchauhan6182

3 жыл бұрын

Bcoz in question p²q²r² is given in denominator and the formula is pqs = -d/a means =2 so p²q²s² = 2² = 4. Hope u understand.

at 11:50 if the roots are non negative then how come the b is -108

@fenzhang

Жыл бұрын

B is not a root

@naveenkamath907

11 ай бұрын

b is not a root it is a coeffiecient of x

Sir, where is the next video containing Descartes sign change rule as you have mentioned in the video. Kindly help

@anandhus603

Жыл бұрын

did you get it ?

At 15 condition is not satisfying for eqn x^3+2x^2-3x-10=0 ....which has one real root at x=2 and 2img roots

At 14.17... The discriminant of cubic equation is b^2-3ac and not 2ac...

@avinashnair8433

4 жыл бұрын

Well That's not at all a discriminant he is saying. That's just a condition.

@sapeduworld

4 жыл бұрын

At 11:13 now he has taken minus sign where as in last video he took positive sign😕😕😕

@avinashnair8433

4 жыл бұрын

@@sapeduworld Here the condition is different. Here we have four roots while in the last video we had 3 roots. Actually u need to understand properly how those roots are being evaluated!! Similarly when we will have 5 roots and 6 roots, it will be different. Try to understand the pattern properly. So that u know what will be for n no. of roots!!

@sapeduworld

4 жыл бұрын

@@avinashnair8433 Bro plz tell from where i can get more info about how these roots work...plz send the link if any

@avinashnair8433

4 жыл бұрын

@@sapeduworld Watch Ravi Sir's introduction video of Cubic Equation. Sir explained those concepts really well 🙂

At 15:55 should c be eual to 25 instead of 125?

@raviprakash6021

5 жыл бұрын

Yeah .. thanks for figuring it out.. we have recorded more than 300 videos, so even after reviewing there can be small errors in around 5% of the videos . I will again review and I will put an ERRATA comment for correction.

@SiddharthBasu100

5 жыл бұрын

@@raviprakash6021 Please upload more videos. Less than 3 months for CAT 2019.

@manjunathm7987

4 жыл бұрын

yes

@Sanchofan1

4 жыл бұрын

@@raviprakash6021 thank s sir for all your efforts.

@avinashnair8433

4 жыл бұрын

@@raviprakash6021 Thanks Sir for the effort and time you had put to make us understand the topic. :)

☑

Sir in the first eqn the roots are p,q,r. Now at x=1 the equation satisfy. one of the roots is 1. whatever we add to 1 we'll get the answer as greater than 1, then how can the answer be 0.25

@jaidevtyagi1033

9 ай бұрын

Ok so the question is wrong as 1 root is real and two are imaginary ✌️. Discriminant= -4

Discriminant is b^2 - 4ac na...

@sachinkumarsingh2518

3 жыл бұрын

Yaar wahi toh yahan 4ac hona chaahiye na, bahut confuse ho gya iss video me...If you got proper explanation of this 2ac , please reply ..

@jaideepsingh4395

3 жыл бұрын

@@sachinkumarsingh2518 bhai ye discriminant nahi hai ye bas ek condition hoti hai jo cubic equation pe apply hoti hai. Or wo jo b^2-4ac hota hai vo bas quadratic equation ke liye hota hai.