Question

$(a + b + c) {}^{2}$
identities​

Answer 1

$(a + b + c ) ^{2} = a ^{2} + b ^{2} + c ^{2} + 2ab + 2bc + 2ca$

Answer 2

$\rm{{(a + b + c)}^{2} = {a}^{2} + {b}^{2} + {c}^{2} + 2(ab + bc + ca)}$