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            <video:title>Completar el cuadrado</video:title>
            <video:description>Algunas expresiones cuadráticas pueden factorizarse como cuadrados perfectos. Por ejemplo, x²+6x+9=(x+3)². Sin embargo, aun cuando una expresión no es un cuadrado perfecto, podemos convertirla en uno al sumarle un número constante. Por ejemplo, x²+6x+5 no es un cuadrado perfecto, pero si le sumamos 4 obtenemos (x+3)². Esto, en esencia, es el método de *completar cuadrados*</video:description>
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