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Use the quadratic formula to solve x2 – 5x – 2 = 0.A.B.C.D.

Question

Use the quadratic formula to solve x2 – 5x – 2 = 0.A.B.C.D.

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Solution

Claro, aquí tienes la solución paso a paso:

La ecuación cuadrática es: x25x2=0 x^2 - 5x - 2 = 0 .

La fórmula cuadrática es: x=b±b24ac2a x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a} .

En esta ecuación, los coeficientes son:

  • a=1 a = 1
  • b=5 b = -5
  • c=2 c = -2

Paso 1: Sustituir los valores de a a , b b y c c en la fórmula cuadrática.

x=(5)±(5)24(1)(2)2(1) x = \frac{-(-5) \pm \sqrt{(-5)^2 - 4(1)(-2)}}{2(1)}

Paso 2: Simplificar dentro de la raíz cuadrada.

x=5±25+82 x = \frac{5 \pm \sqrt{25 + 8}}{2}

Paso 3: Sumar dentro de la raíz cuadrada.

x=5±332 x = \frac{5 \pm \sqrt{33}}{2}

Paso 4: Escribir las dos soluciones posibles.

x=5+332 x = \frac{5 + \sqrt{33}}{2} x=5332 x = \frac{5 - \sqrt{33}}{2}

Por lo tanto, las soluciones de la ecuación cuadrática x25x2=0 x^2 - 5x - 2 = 0 son:

x=5+332 x = \frac{5 + \sqrt{33}}{2} x=5332 x = \frac{5 - \sqrt{33}}{2}

This problem has been solved

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