A quadratic equation has a squared term as its highest power, such as $x^2-x-6=0$. The graph above is of $y=(x+2)(x-3)=x^2-x-6$, so its roots are $x=-2$ and $x=3$. In this lesson, we focus on equations of the form $x^2+bx+c=0$, where the coefficient of $x^2$ is 1.