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Solve the equation x, squared, plus, 11, x, plus, 17, equals, 0x 2 +11x+17=0 to the nearest tenth.

Question

Solve the equation x, squared, plus, 11, x, plus, 17, equals, 0x 2 +11x+17=0 to the nearest tenth.

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Solution

Para resolver la ecuación x2+11x+17=0x^2 + 11x + 17 = 0 a la décima más cercana, podemos usar la fórmula cuadrática, que es:

x=b±b24ac2ax = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}

En esta ecuación, a=1a = 1, b=11b = 11, y c=17c = 17. Sustituimos estos valores en la fórmula cuadrática:

  1. Calculamos el discriminante: b24ac=1124(1)(17)b^2 - 4ac = 11^2 - 4(1)(17) =12168= 121 - 68 =53= 53

  2. Sustituimos el discriminante en la fórmula cuadrática: x=11±532(1)x = \frac{-11 \pm \sqrt{53}}{2(1)} x=11±532x = \frac{-11 \pm \sqrt{53}}{2}

  3. Calculamos las dos posibles soluciones: x1=11+532x_1 = \frac{-11 + \sqrt{53}}{2} x2=11532x_2 = \frac{-11 - \sqrt{53}}{2}

  4. Aproximamos 53\sqrt{53} a la décima más cercana: 537.3\sqrt{53} \approx 7.3

  5. Sustituimos esta aproximación en las soluciones: x1=11+7.32x_1 = \frac{-11 + 7.3}{2} x1=3.72x_1 = \frac{-3.7}{2} x11.9x_1 \approx -1.9

x2=117.32x_2 = \frac{-11 - 7.3}{2} x2=18.32x_2 = \frac{-18.3}{2} x29.2x_2 \approx -9.2

Por lo tanto, las soluciones de la ecuación x2+11x+17=0x^2 + 11x + 17 = 0 a la décima más cercana son aproximadamente x1.9x \approx -1.9 y x9.2x \approx -9.2.

This problem has been solved

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