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Find the equation of the axis of symmetry of the following parabola algebraically.y, equals, 3, x, squared, minus, 42, x, plus, 156y=3x 2 −42x+156

Question

Find the equation of the axis of symmetry of the following parabola algebraically.y, equals, 3, x, squared, minus, 42, x, plus, 156y=3x 2 −42x+156

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Solution

Para encontrar la ecuación del eje de simetría de la parábola dada y=3x242x+156 y = 3x^2 - 42x + 156 , seguimos estos pasos:

  1. Identificar la forma estándar de la ecuación cuadrática: La ecuación de la parábola está en la forma y=ax2+bx+c y = ax^2 + bx + c , donde:

    • a=3 a = 3
    • b=42 b = -42
    • c=156 c = 156
  2. Usar la fórmula para el eje de simetría: La fórmula para encontrar el eje de simetría de una parábola en la forma y=ax2+bx+c y = ax^2 + bx + c es: x=b2a x = -\frac{b}{2a}

  3. Sustituir los valores de a a y b b en la fórmula: x=4223 x = -\frac{-42}{2 \cdot 3}

  4. Simplificar la expresión: x=426 x = \frac{42}{6} x=7 x = 7

Por lo tanto, la ecuación del eje de simetría de la parábola y=3x242x+156 y = 3x^2 - 42x + 156 es: x=7 x = 7

This problem has been solved

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y=3x 2 −42x+156

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