Math, asked by navitachopra80p9ra3w, 1 year ago

what will be the answer ????

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Answers

Answered by bcgsimrarpampkx

answer is -25 of the question

navitachopra80p9ra3w: we have to prove it

navitachopra80p9ra3w: sir the answer will be -25

snandi435: But we have to prove it it's given in the question only that the answer is -25.

navitachopra80p9ra3w: yes, but she or he had written only -25 not prove it

Answered by snandi435

Given a+b+c=5
ab+bc+ca=10
To prove a3 +b3+c3-3abc=-25
(a+b+c)2=a2+b2+c2+2ab+2bc+2ca
= a2+b2+c2+2(10)
(5)2 -20 =a2+ b2+c2
25-20=a2+b2+c2
5=a2+b2+c2

a3+b3+c3-3abc=(a+b+c)(a2+b2+c2-ab-bc-ca)
=(5)(5-10)
=(5)(-5)
=-25

Hence proved.

Can u please mark me brainiest????

snandi435: Ur wlcm

navitachopra80p9ra3w: ok i will matk you as brainlist

navitachopra80p9ra3w: mark

snandi435: Plss

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