Ask a Doubt
Request a call back

Join NOW to get access to exclusive study material for best results

CBSE Class 9 Answered

Please answer this question
question image
Asked by Girishdhawan | 25 Jun, 2018, 08:53: PM
answered-by-expert Expert Answer
a3 + b3 + c3  = 3abc and a + b + c = 0 
a + b + c = 0
a + b = -c, b + c = -a, a + c = -b
begin mathsize 16px style fraction numerator left parenthesis straight b plus straight c right parenthesis squared over denominator 3 bc end fraction plus fraction numerator begin display style left parenthesis straight c plus straight a right parenthesis squared end style over denominator begin display style 3 ac end style end fraction plus fraction numerator begin display style left parenthesis straight a plus straight b right parenthesis squared end style over denominator begin display style 3 ab end style end fraction equals fraction numerator begin display style left parenthesis negative straight a right parenthesis squared end style over denominator begin display style 3 bc end style end fraction plus fraction numerator begin display style left parenthesis negative straight b right parenthesis squared end style over denominator begin display style 3 ac end style end fraction plus fraction numerator begin display style left parenthesis negative straight c right parenthesis squared end style over denominator begin display style 3 ab end style end fraction equals fraction numerator straight a squared over denominator 3 bc end fraction plus fraction numerator straight b squared over denominator 3 ac end fraction plus fraction numerator straight c squared over denominator 3 ab end fraction equals fraction numerator straight a cubed plus straight b cubed plus straight c cubed over denominator 3 abc end fraction equals fraction numerator 3 abc over denominator 3 abc end fraction equals 1 end style
Answered by Sneha shidid | 29 Jun, 2018, 10:00: AM

Concept Videos

Multiple Choice Questions Practice Test
Answered Unanswered My Questions My Answers
CBSE 9 - Maths
expand(2x+1)³
Asked by durgavenkatlakshmi1 | 20 Mar, 2024, 03:56: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Maths
factorise: a^7+ab^6
Asked by shivalaxmi0205 | 23 Feb, 2023, 10:28: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Maths
if x-2y=11 and xy=8. find the value of x³-8y³
Asked by shivalaxmi0205 | 21 Feb, 2023, 07:34: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Maths
if x-1/x=3, then find value of x³-1/x³.
Asked by shivalaxmi0205 | 21 Feb, 2023, 07:33: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Maths
(a+b+c)^3
Asked by kbalanbiju | 18 Jan, 2023, 07:16: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Maths
(3x-5y+4)(9x^2+25y^2+15xy-20y+12x+16)
Asked by mmansingh949 | 21 Jun, 2022, 09:54: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Maths
solve please
question image
Asked by iamsimanta123 | 09 Jun, 2022, 07:30: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Maths
17. If a + b + c = 4 and a ^ 2 + b ^ 2 + c ^ 2 = 55/2 then find the value of a ^ 3 + b ^ 3 + c ^ 3 - 3abc
Asked by dalalvansh4 | 02 Jun, 2022, 07:03: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Maths
factorise the following a^3+b^3+3a-3b
Asked by s1044kasturipriyambada026582 | 27 May, 2022, 12:02: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 9 - Maths
I want to solve this question
question image
Asked by abilash8b | 06 Jan, 2022, 12:27: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
My Class Videos Tests ₹ Plans Ask a Doubt
Get Latest Study Material for Academic year 24-25 Click here
×