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Solve the equation for all values of x by completing the square.x, squared, plus, 14, x, plus, 48, equals, 0x 2 +14x+48=0

Question

Solve the equation for all values of x by completing the square.x, squared, plus, 14, x, plus, 48, equals, 0x 2 +14x+48=0

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Solution

Claro, aquí tienes la solución paso a paso:

  1. Comienza con la ecuación original: x2+14x+48=0 x^2 + 14x + 48 = 0

  2. Mueve el término constante al otro lado de la ecuación: x2+14x=48 x^2 + 14x = -48

  3. Para completar el cuadrado, toma la mitad del coeficiente de x x (que es 14), divídelo por 2 y luego elévalo al cuadrado: (142)2=72=49 \left(\frac{14}{2}\right)^2 = 7^2 = 49

  4. Añade y resta este valor (49) en el lado izquierdo de la ecuación: x2+14x+4949=48 x^2 + 14x + 49 - 49 = -48 x2+14x+49=1 x^2 + 14x + 49 = 1

  5. Ahora, el lado izquierdo de la ecuación es un trinomio cuadrado perfecto: (x+7)2=1 (x + 7)^2 = 1

  6. Toma la raíz cuadrada de ambos lados de la ecuación: x+7=±1 x + 7 = \pm 1

  7. Resuelve para x x restando 7 de ambos lados: x+7=1ox+7=1 x + 7 = 1 \quad \text{o} \quad x + 7 = -1 x=17ox=17 x = 1 - 7 \quad \text{o} \quad x = -1 - 7 x=6ox=8 x = -6 \quad \text{o} \quad x = -8

Por lo tanto, las soluciones de la ecuación son: x=6yx=8 x = -6 \quad \text{y} \quad x = -8

This problem has been solved

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