(a) Use the quadratic formula to solve \( x^{2}-7 x+3=0 \). Separate multiple answers with a comma, if necessary. Write your answer in exact, simplified form. The solution set is \( \{\square\} \). S

To solve the quadratic equation \( x^{2}-7x+3=0 \) using the quadratic formula, we start with the formula itself: \[ x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a} \] Here, \( a = 1 \), \( b = -7 \), and \( c = 3 \). First, we calculate the discriminant: \[ b^2 - 4ac = (-7)^2 - 4(1)(3) = 49 - 12 = 37 \] Now, plugging the values into the formula gives: \[ x = \frac{-(-7) \pm \sqrt{37}}{2(1)} = \frac{7 \pm \sqrt{37}}{2} \] Thus, the solution set is: \[ \left\{ \frac{7 + \sqrt{37}}{2}, \frac{7 - \sqrt{37}}{2} \right\} \]