You could have downloaded RootSolver 1.5.0.2 from our software library for free. RootSolver.exe is the most common filename for this program's installer. The following version: 1.5 was the most frequently downloaded one by the program users. The actual developer of the program is chemesoftstore. RootSolver lies within Education Tools, more precisely Science Tools.
From the developer:
RootSolver is an application used for interpolation/extrapolation. It allows you to solve the roots of quadratic, cubic, and quartic equations, as well as finding the solutions to functions of x -> f(x). Includes complex number math solutions as well.
You may want to check out more software, such as Panel, Avantage BPM Foundation or gitoolbox, which might be similar to RootSolver.