Chapter 9 - Quadratic Functions and Equations - 9-6 The Quadratic Formula and the Discriminant - Lesson Check - Page 586: 1

$x=-4$ or $x=\frac{1}{3}$

We are given: $-3x^2-11x+4=0$ Use the quadratic formula. $x=\frac{-(-11) \pm \sqrt (-11)^2-4.4(-3)}{2.(-3)}$ $x=\frac{11 \pm 13}{-6}$ Simplify: $x=\frac{11 +13}{-6}$ or $x=\frac{11 - 13}{-6}$ $x=-4$ or $x=\frac{1}{3}$