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ramu
· commented
· 1 Months ago
(a+b-c)*(a+b+c)=26
similarly
(b+c-a)*(a+b+c)=67
(c+a-b)*(a+b+c)=76
adding 3 eqns
(a+b+c)*(a+b+c)=26+67+76=169
a+b+c=13