4-2-1-

Question Number 89074 by Alhaji Bai Sama last updated on 15/Apr/20

\times^{4} + \times^{2} = 1

Commented by john santu last updated on 15/Apr/20

x^{4} + x^{2} - 1 = 0

x^{2} = \frac{- 1 \pm \sqrt{5}}{2}

x = \pm \sqrt{\frac{- 1 \pm \sqrt{5}}{2}}