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PSAT/NMSQT
PSAT Math Test - No Calculator Section

Finding the x-coordinate of the Vertex of a Quadratic Function

Easy Passport To Advanced Math Quadratic Functions

Consider the quadratic function defined by the equation:

$$f(x) = 2x^2 - 8x + 6$$

To find the $x$-coordinate of the vertex of this parabola, you can use the vertex formula:

$$x = -\f\frac{b}{2a}$$

where $a$ and $b$ are the coefficients from the standard form of the quadratic equation, $$ax^2 + bx + c$$. Calculate the $x$-coordinate of the vertex and enter your answer in the grid below as a decimal.

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