If a²+b²+c²=27 and 2(ab+bc+ca)=54 then what is the value of abc?
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Step-by-step explanation:
a²+b²+c²=27
2(ab+bc+ca)=54
= 2ab+2bc+2ca=54
(a+b+c)^2 = a²+b²+c² +2ab+2bc+2ca
= 27+54 = 81
hence, (a+b+c) =9
it will help you
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