Determine which of the following statements is true concerning the values described in column #1 and column #2.




Column #1

Column #2


The x-coordinate of the vertex of the equation
y = 2x2 − 4x + 12 The x-coordinate of the vertex of the equation
y = 4x2 + 8x + 3

Respuesta :

Below are the choices:

The value found in column #1 is greater than the value found in column #2. 
The value found in column #1 is less than the value found in column #2. 
The value found in column #1 is equivalent to the value found in column #2. 
The relationship between column #1 and column #2 cannot be determined by the information given. 

 y = -2x^2 - 4x + 12 = -2(x^2 + 2x) + 12 = -2(x^2 + 2x + 1) + 12 + 2 = -2(x + 1)^2 + 14 

y = x^2 - 4x + 3 = (x^2 - 4x) + 3 = (x^2 - 4x + 4) + 3 - 4 = (x - 2)^2 - 1 

The vertex is (-1, 14) in the first; (2, -1) in the second. 

column 1 value is less than column 2 value. 

Coordinate of vertex is the point at which the parabola crosses its axis of symmetry. The value of the column 2 is less than the value of the column 1.

Given information-

Column one states that,

The x-coordinate of the vertex of the equation is,

[tex]y = 2x^2 -4x + 12[/tex]

Column Two states that,

The x-coordinate of the vertex of the equation,

[tex]y = 4x^2 + 8x + 3[/tex]

Coordinate vertex

Coordinate vertex is the point at which the parabola crosses its axis of symmetry.

For the standard quadratic equation of parabola,

[tex]ax^2+bx+c[/tex]

The x coordinate of the vertex for the above equation is,

[tex]\dfrac{-b}{2a} [/tex]

Let the first equation;

[tex]y = 2x^2 -4x + 12\\ [/tex]

Compare this equation with standard equation we get,

[tex]\dfrac{-b}{2a} =\dfrac{-(-4)}{2\times2}\\ \dfrac{-b}{2a}=1[/tex]

Thus the value of the column 1 is 1.

The second equation,

[tex]y = 4x^2 + 8x + 3 [/tex]

Compare this equation with standard equation we get,

[tex]\dfrac{-b}{2a} =\dfrac{-8}{4\times2}\\ \dfrac{-b}{2a}=-1[/tex]

The value of the column 2 is -1

Hence the value of the column 2 is less than the value of the column 1.

Learn more about the coordinate of vertex here;

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