solve for x
x^2+18x+4=0
is the answer -18 + or -square root symbol 90
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:
x^2+18x+4=0
and click option: solve it!
You wil see solution step-by-step.