Chapter 9 - Quadratic Functions and Equations - 9-6 The Quadratic Formula and the Discriminant - Practice and Problem-Solving Exercises - Page 588: 50

Answer D

$x^2-7x+3=0$ Use the quadratic formula. $x=\frac{-(-7)+\sqrt (-7)^2-4.1.3}{2.1}$ $x=\frac{7 \pm \sqrt 37}{2}$ $x=\frac{7 \pm 6.08}{2}$ $x=\frac{7+6.08}{2}$ or $x=\frac{7- 6.08}{2}$ $x=6.54$ or $x=0.46$ The correct answer is D.