Related Post: X^4+2x^3-1=0 X 4 2x 3 X 2 1 0 X 4 2x 3 3x 2 2x 1 0 X 4 2x 3 13x 2 2x 1 0 X 4 2x 3 3x 2 4x 1 0 Solve X 4 2x 3 X 2 2x 1 0 The Equation X 4 2x 3 3x 2 4x 1 0 4 X 1 * 0.5 3 2x 1 0 X X 5 X 4 2x 3 2x 2 X 1 0 4 X 1 * 0.5 3 2x 1 8