Use the quadratic formula to solve for \( x \). \[ 6 x^{2}-2 x-1=0 \] (If there is more than one solution, separate them with commas.) \( x=\square \)
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To solve the quadratic equation \( 6x^2 - 2x - 1 = 0 \) using the quadratic formula \( x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a} \), we identify \( a = 6 \), \( b = -2 \), and \( c = -1 \). First, calculate the discriminant \( b^2 - 4ac \): \[ (-2)^2 - 4(6)(-1) = 4 + 24 = 28. \] Now, plug it into the quadratic formula: \[ x = \frac{-(-2) \pm \sqrt{28}}{2(6)} = \frac{2 \pm \sqrt{28}}{12}. \] Since \( \sqrt{28} = 2\sqrt{7} \), we rewrite: \[ x = \frac{2 \pm 2\sqrt{7}}{12} = \frac{1 \pm \sqrt{7}}{6}. \] Thus, the solutions for \( x \) are: \[ x = \frac{1 + \sqrt{7}}{6}, \frac{1 - \sqrt{7}}{6}. \]