For finding the roots of the function, we have to writte the equation in this form:

So in our problem will be:

Now we can use the cuadratic equation that is:
![\frac{-b\pm\sqrt[]{b^2-4ac}}{2a}](https://img.qammunity.org/2023/formulas/mathematics/college/kaoalb540qnvy45obw509ttuwfskx00e99.png)
and in our problem will be:
![\begin{gathered} \frac{4\pm\sqrt[]{16^{}-4(1)(-5)}}{2(1)} \\ \frac{4\pm\sqrt[]{16^{}+20}}{2} \\ \frac{4\pm\sqrt[]{36}}{2} \\ (4\pm6)/(2) \end{gathered}](https://img.qammunity.org/2023/formulas/mathematics/college/l815p8hqmpwb01tspu4eipjubeqgxi967g.png)
Now we can find our two solutions or roots, one with the + and the other with the -
1)

2)

so the roots are going to be: -1, 5