santaclaus wrote:...when I looked at the help area you told me to go to, I saw that you had to square both sides and then solve the equation: so, i tried: x^{4}-2x+x=16-4x+x

Your original equation was:

. . . . .Squaring the left-hand side gives:

. . . . .. . . . .Squaring the right-hand side gives:

. . . . .. . . . .(To learn how to multiply polyomials and polynomial-like expressions, try

here. To learn how to work with radicals, try

here.

To solve the resulting equation, you'll need to isolate the radicals on one side, and then square again.

. . . . .. . . . .. . . . .. . . . .Note that x

^{4} - 16 = (x

^{2} - 4)(x

^{2} + 4) and 2x

^{2} - 8 = 2(x

^{2} - 4)....

If you get stuck, please reply showing your steps. Thank you!