Chọn câu  ĐÚNG? A. {a + b} ^3} = {a^3} + {b^3}                                                

\[{\left( {a + b} \right)^3} = {a^3} + {b^3}\].

\[{\left( {a + b} \right)^3} = {a^3} + 3{a^2}b + 3a{b^2} + {b^3}\].

\[{\left( {a + b} \right)^3} = {a^3} - 3{a^2}b - 3a{b^2} + {b^3}\].

\[{\left( {a + b} \right)^3} = {a^3} + {a^2}b + a{b^2} + {b^3}\].