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Find the coordinates of the vertex of the graph of the following equation: 𝑦=(𝑥+2)(𝑥+6)y=(x+2)(x+6)

Question

Find the coordinates of the vertex of the graph of the following equation: 𝑦=(𝑥+2)(𝑥+6)y=(x+2)(x+6)

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Solution

Para encontrar las coordenadas del vértice de la parábola dada por la ecuación y=(x+2)(x+6) y = (x+2)(x+6) , sigue estos pasos:

  1. Expande la ecuación: y=(x+2)(x+6) y = (x+2)(x+6) Multiplica los términos: y=x2+6x+2x+12 y = x^2 + 6x + 2x + 12 Simplifica: y=x2+8x+12 y = x^2 + 8x + 12

  2. Identifica los coeficientes: La ecuación está en la forma estándar y=ax2+bx+c y = ax^2 + bx + c , donde: a=1,b=8,c=12 a = 1, \quad b = 8, \quad c = 12

  3. Encuentra la coordenada x x del vértice: La fórmula para la coordenada x x del vértice de una parábola es: x=b2a x = -\frac{b}{2a} Sustituye los valores de a a y b b : x=821=82=4 x = -\frac{8}{2 \cdot 1} = -\frac{8}{2} = -4

  4. Encuentra la coordenada y y del vértice: Sustituye x=4 x = -4 en la ecuación original para encontrar y y : y=(4+2)(4+6) y = (-4+2)(-4+6) Calcula los valores dentro de los paréntesis: y=(2)(2)=4 y = (-2)(2) = -4

  5. Escribe las coordenadas del vértice: Las coordenadas del vértice son: (4,4) (-4, -4)

Por lo tanto, las coordenadas del vértice de la gráfica de la ecuación y=(x+2)(x+6) y = (x+2)(x+6) son (4,4) (-4, -4) .

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