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(6) \( x^{2}-16 x-3 b= \)

Ask by Marshall Wyatt. in Mexico
Mar 17,2025

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Answer

La solución de la ecuación \( x^{2} - 16x - 3b = 0 \) es \[ x = \frac{16 \pm \sqrt{256 + 12b}}{2}\quad \text{o, equivalentemente,} \quad x = 8 \pm \frac{\sqrt{256 + 12b}}{2}. \]

Solution

1. Partimos de la ecuación \[ x^{2} - 16x - 3b = 0. \] 2. Identificamos los coeficientes de la ecuación cuadrática en la forma general \( ax^2 + dx + c = 0 \): \[ a = 1,\quad d = -16,\quad c = -3b. \] 3. Aplicamos la fórmula cuadrática \[ x = \frac{-d \pm \sqrt{d^2 - 4ac}}{2a}. \] Sustituyendo los coeficientes, obtenemos \[ x = \frac{-(-16) \pm \sqrt{(-16)^2 - 4\cdot 1\cdot (-3b)}}{2\cdot 1}. \] 4. Simplificamos los términos: - El numerador: \[ -(-16) = 16. \] - El discriminante: \[ (-16)^2 - 4\cdot 1\cdot (-3b) = 256 + 12b. \] Entonces, la fórmula queda \[ x = \frac{16 \pm \sqrt{256 + 12b}}{2}. \] 5. Se puede simplificar dividiendo numerador y denominador entre 2: \[ x = 8 \pm \frac{\sqrt{256 + 12b}}{2}. \] La solución de la ecuación \( x^{2} - 16x - 3b = 0 \) es \[ x = \frac{16 \pm \sqrt{256 + 12b}}{2}\quad \text{o, equivalentemente,} \quad x = 8 \pm \frac{\sqrt{256 + 12b}}{2}. \]

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Beyond the Answer

Did you know that the expression \(x^{2}-16x-3b\) resembles the structure of a quadratic equation? In fact, quadratic equations like this one can often be solved using the quadratic formula: \(x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}\). Here, \(a\) is 1, \(b\) is -16, and \(c\) is \(-3b\). It’s an excellent way to find the roots of the equation, or determine where it crosses the x-axis! If you’re working on simplifying or factoring this expression, check to see if you can identify any common factors or use completing the square! The coefficient of \(x^2\) is 1, which makes it easier to manipulate. Just remember to keep track of your signs and subtract or add appropriately to avoid common pitfalls, like misplacing a negative!

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