Can someone show me how to solve this equation please? This is part of something bigger, but what I'm stuck on is just algebra

$\displaystyle 2x^2+x-1=0$

I can distribute it to x(2x+1) = 1, but am not really sure what to do from there, or if that's even the proper way to go. I would normally try to factor, but I don't think this is factorable. Any assistance is appreciated.