1.

A+b+c=12a2+ b2+ c2=70ab +bc+ca=37Find the value of a b and c

Answer»

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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