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A+b+c=12a2+ b2+ c2=70ab +bc+ca=37Find the value of a b and c |
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Answer» a+b+c=12 (a+b+c)2=122 a2+b2+c2+2(ab+bc+ca)=144 64+2(ab+bc+ca)=144 ab+bc+ca=144−642 =40 |
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