Solve the equation. Provide an explanation please.

s^2-7s+14=2

In google type:

quadratic equation online

When you see list of results click on:

Free Online Quadratic Equation Solver:Solve by Quadratic Formula

When page be open in rectangle type:

s ^ 2 - 7 s + 14 = 2

and click option: solve it!

You wil see solution step-by-step