Find the equation of the parabola which is symmetric about the x-axis and passes through the point `(2, -6)`.

Explanation

To find the equation of the parabola that is symmetric about the x-axis and passes through the point (2, -6), we can follow these steps:

### Step 1: Understand the form of the parabola
Since the parabola is symmetric about the x-axis, it can be represented in the form:
\[ y^2 = 4ax \]
where \( a \) is a constant that determines the width and direction of the parabola.

### Step 2: Substitute the given point into the equation
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