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ParthKohli
Group Title
Given the following statements: \( 2x + 3y =12 \)
\( xy = 6\)
What is \(8x^3 + 27y^3\)?
 2 years ago
 2 years ago
ParthKohli Group Title
Given the following statements: \( 2x + 3y =12 \) \( xy = 6\) What is \(8x^3 + 27y^3\)?
 2 years ago
 2 years ago

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lgbasallote Group TitleBest ResponseYou've already chosen the best response.1
\[(8x^3 + 27y^3) \implies (2x +3y)(4x^2 + 6(xy) + 9y^2\] does that give you a hint
 2 years ago

waterineyes Group TitleBest ResponseYou've already chosen the best response.2
\[a^3 + b^3 = (a + b)(a^2 + b^2  ab)\]
 2 years ago

ParthKohli Group TitleBest ResponseYou've already chosen the best response.0
Ah! Gotcha!
 2 years ago

apoorvk Group TitleBest ResponseYou've already chosen the best response.0
\[8x^3 + 27y^3 = (2x)^3 + (3y)^3\] Use the funda below: \[(a)^3+(b)^3 = (a+b)(a^2ab +b^2)\]
 2 years ago

lgbasallote Group TitleBest ResponseYou've already chosen the best response.1
\[\implies (2x+3y)[(2x + 3y)^2  6(xy)]\] \[\implies (12)[(12)^2  6(6)]\] \[\implies (12)[144  36]\] etc.
 2 years ago

ParthKohli Group TitleBest ResponseYou've already chosen the best response.0
Yep. Thanks!
 2 years ago

mathslover Group TitleBest ResponseYou've already chosen the best response.0
@ParthKohli may i give you an advise?
 2 years ago

ParthKohli Group TitleBest ResponseYou've already chosen the best response.0
Yes, please :)
 2 years ago

mathslover Group TitleBest ResponseYou've already chosen the best response.0
dude this is in class IX maths 2nd chapter try to do problems also from entrancei.com or from ncert exempler problems usually this advice is not given by any teacher ( some are exceptional ) but i am giving you since talent needs guidance :)
 2 years ago

ParthKohli Group TitleBest ResponseYou've already chosen the best response.0
Let me try to watch some videos related to this topic so I could brushup my skills. Thanks!
 2 years ago

mathslover Group TitleBest ResponseYou've already chosen the best response.0
Yes that is a better way @ParthKohli but videos are ok for you as you are in a lower age for this level that is you are doing higher but remember : when you come in 9th dont prefer videos since videos make the student dependent .. :) best of luck dude .. and thanks for taking that as positive
 2 years ago

ParthKohli Group TitleBest ResponseYou've already chosen the best response.0
I disagree: Videos are pretty dynamic and visual.
 2 years ago

mathslover Group TitleBest ResponseYou've already chosen the best response.0
friend ... they are dynamic and visual , they can be used for at the last days of exams .. to just revise withing minutes but my main point was that "dont' dedicate yourself completely on videos .. but since you are at present doing higher .. prefer videos first :) "
 2 years ago

ParthKohli Group TitleBest ResponseYou've already chosen the best response.0
I see. I do know polynomials, but I don't know how to do these kinds of problems. Let me see.
 2 years ago

mathslover Group TitleBest ResponseYou've already chosen the best response.0
being disagreed has the reason since at this time videos are helping you very much ... for higher level .. .
 2 years ago

ParthKohli Group TitleBest ResponseYou've already chosen the best response.0
I use http://tutorial.math.lamar.edu, but it doesn't have such practice problems.
 2 years ago

mathslover Group TitleBest ResponseYou've already chosen the best response.0
for practice problems prefer this link : http://www.ncert.nic.in/NCERTS/textbook/textbook.htm?ieep2=217
 2 years ago

mathslover Group TitleBest ResponseYou've already chosen the best response.0
main concepts .. then problems
 2 years ago

ParthKohli Group TitleBest ResponseYou've already chosen the best response.0
I actually do know all these identities, but sometimes it becomes a paininthebrain to apply them.
 2 years ago

mathslover Group TitleBest ResponseYou've already chosen the best response.0
Hmn yes it becomes .. see whenever you are given with that type of questions and you know that is something related to this topic then : try to make it similar to the identities
 2 years ago
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