Question

If a^2 + b^2 + c^2 =125 and ab+bc+ca=50,find a+b+c

Answer 1

Answer:

$(a + b + c)^{2} = \\ {a}^{2} + {b}^{2} + {c }^{2} + 2( ab + bc + ca) \\ 125 + 2(50) \\ 225 \: is \: the \: answer$