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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

1. ### Break Down the Problem

To find the coordinates of the vertex of the quadratic equation y=(x+2)(x+6) y = (x + 2)(x + 6) , we first need to convert it into standard form, which is y=ax2+bx+c y = ax^2 + bx + c .

2. ### Relevant Concepts

The vertex (h,k) (h, k) of a parabola given in standard form can be found using the formula: h=b2a h = -\frac{b}{2a} where a a and b b are the coefficients from y=ax2+bx+c y = ax^2 + bx + c .

3. ### Analysis and Detail

  1. Expand the given equation: y=(x+2)(x+6)=x2+6x+2x+12=x2+8x+12 y = (x + 2)(x + 6) = x^2 + 6x + 2x + 12 = x^2 + 8x + 12 Here, we identify: a=1,b=8,c=12 a = 1, \quad b = 8, \quad c = 12

  2. Calculate the x-coordinate of the vertex: h=b2a=821=4 h = -\frac{b}{2a} = -\frac{8}{2 \cdot 1} = -4

  3. Calculate the y-coordinate of the vertex: Substitute x=4 x = -4 back into the equation to find k k : y=(4+2)(4+6)=(2)(2)=4 y = (-4 + 2)(-4 + 6) = (-2)(2) = -4

4. ### Verify and Summarize

The vertex coordinates are h=4 h = -4 and k=4 k = -4 . Thus, the vertex is located at (4,4) (-4, -4) .

Final Answer

The coordinates of the vertex are (4,4) \boxed{(-4, -4)} .

This problem has been solved

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