Algebraic Formula = (x+3)²
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⇢(x + 3)²
\fbox{(a+b)²~=~a²~+~b²~+~2ab}
(a+b)² = a² + b² + 2ab
\tt{\hookrightarrow( x)²~+~(3)²~+~2×x×3}↪(x)² + (3)² + 2×x×3
\tt{\hookrightarrow x²~+~9~+~6x}↪x² + 9 + 6x
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