I am not exactly sure how you are supposed to do this, but I have an idea. You can separate the function x^2+6x-2 into the difference of 2 functions, so say that (x^2) - (-6x+2) = 0. You can easily graph x^2 by hand, as you can -6x+2. Since the difference of those 2 functions is zero, just plot them both on the same graph and see where they are equal (where they intersect). You should then be able to estimate the x values, or at least say what integers they lie between.

Originally Posted byHayabusa