0 votes 0 votes If $x^{2}+ x - 1 = 0$ what is the value of $x^4 + \dfrac{1}{x^4}$? $1$ $5$ $7$ $9$ Quantitative Aptitude gate2018 numerical-ability polynomials + – gatecse asked Feb 20, 2018 • retagged Mar 14, 2021 by Lakshman Bhaiya gatecse 1.4k points answer See all 0 reply