Question

Evaluate 3(a + b + c)2 squared for a = 2, b = 3, and c = 4.

Answer 1

hint:
you can use this identity:
\[\large {\left( {a + b + c} \right)^2} = {a^2} + {b^2} + {c^2} + 2ab + 2ac + 2bc\]

Answer 2

otherwise, you can substitute your numerical data into your expression:
\[\Large \begin{gathered}
a + b + c = 2 + 3 + 4 = 9 \hfill \\
3{\left( {a + b + c} \right)^2} = 3 \cdot {9^2} = ...? \hfill \\
\end{gathered} \]