Tozo_Ejemplos+de+prueba

math \[ \begin{array}{l} (3 - x)^2 = 9 - 2 \cdot 3 \cdot x + x^2 = 9 - 6x + x^2 \\ (5 + x)^2 = 25 + 2 \cdot 5 \cdot x + x^2 = 25 + 10x + x^2 \\ (x - 3)^2 = x^2 - 2 \cdot x \cdot 3 + 9 = x^2 - 6x + 9 \\ (6x + 2)^2 = 36x^2 + 2 \cdot 6x \cdot 2 + 4 = 36x + 24x + 4 \\ (7x - 1)^2 = 49x^2 - 2 \cdot 7x \cdot 1 + 1 = 49x^2 - 14x + 1 \\ \end{array} \]

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