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Question Number 42009 by 737954 last updated on 16/Aug/18
if(a+bω+cω2)+(aω+bω2+c)2+(aω2+b+cω)2=0thenprovethata=cora+c=2b
Answered by tanmay.chaudhury50@gmail.com last updated on 16/Aug/18
a2+a2w2+a2w4+b2w2+b2w4+b2+c2w4+c2+c2w2+2abw+2abw3+2abw2+2bcw3+2bcw2+2bcw+2acw2+2acw+2acw3=a2(1+w2+w)+b2(w2+w+1)+c2(w+1+w2)+2ab(w+w3+w2)+2bc(w3+w2+w)+2ac(w2+w+w3)a×0+b×0+c×0+(1+w+w2)(2ab+2bc+2ac)=0×(2ab+2bc+2ac=0plscheckthequestionbecausegivenexpression=0onsimplificationbutcannotprovea=cora+c=2bw4=w3.w=1.w=w1+w+w2=0formulaihavesquaredandthenaddedidenticaltermsbymindcalculationbecauze(A+B+C)2=A2+B+C2+2AB+2BC+2AC
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