Hey all, the problem in the title is what has me confused. i know there are solutions, but I do not know how to arrive at the solution. Maybe a step by step, or even a website explaining how to solve this type of problem would be very helpful. Thanks : )

Thanks for helping me icemanfan, I really appreciate the time you took to help me. I made a mistake in my original equation, and for that I am truly sorry. The correct equation is x^4-4x^2+2=0. Again, I'm sorry