Revision as of 22:07, 20 April 2021 by Cellsecret(talk | contribs)(Created page with "If <math>x+\frac{1}{x}=-2</math> and <math>y=\frac{1}{x^{2}}</math>, find <math>\frac{1}{x^{4}}+\frac{1}{y^{4}}</math>. <math>\textbf{(A)} ~-2 \qquad\textbf{(B)} ~-1 \qquad\t...")