guys, thanx a lot for information, this equation doesn't just have the two positive roots..it does have a negative root also.like whatmore said, the higher degree eqns have more roots and the highest power of this equation is the variable itself. so the solution is x=2,4 and -0.767 plz see the graph attached......... havent taken the calc. 2 n 3 i believe log is the ultimate way for the solution...