### Home > CAAC > Chapter 9 > Lesson 9.1.2 > Problem9-21

9-21.

Solve the quadratic equation below. Check your solutions with a calculator.

$3x^2+2.5x=12.5$

Use the Quadratic Formula.

$\textit{x} = \frac {-\textit{b} \pm \sqrt {\textit{b}^2 - 4\textit{ac}}}{2\textit{a}}$

Set the equation equal to $0$ before using the formula.