Use the square of a binomial formula to expand (x+4)^2.
\( \begin{array}{l}\textbf{Simplify: } (x + 4)^2\end{array} \)
Choose one option:
Always expand systematically: first square a, then 2ab, then b^2.
Apply (a+b)^2 = a^2 + 2ab + b^2 carefully for a = x and b = 4.
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