If `a+b+c=15, ab+bc+ca=60` then `a^2+b^2+c^2=`

If a+b+ c=9 and ab + bc +ca = 15 , find : a^2 + b^2 + c^2 .

If a^(2) +b^(2) +c^(2) = ab + bc + ca then (a+b)/(c ) + (b+c)/(a) + (c+a)/(b) =?

If a^(2) +b^(2) +c^(2) = ab + bc + ca then (c )/(a+b) + (b)/(a +c)+ (c )/(a+b) = ?

If a+b+c=2 and ab+bc+ca=1 then find (a+b)^2+(b+c)^2+(c+a)^2

If ab + bc + ca = 0 , then the value of 1/(a^2 - bc) + 1/(b^2 - ca) + 1/(c^2 - ab) will be :

If a^(2) +b^(2) +c^(2) = ab + bc + ca then ((a+b)/(c ) + (b+c)/(a) + (c+a)/(b)) ((c )/(a+b) + (b)/(a+c) + (c )/(a+b)) =?

If a,b,c are in H.P and ab + bc ca = 15, then ca =