1 votes 1 votes Let $A$ be an element of $\mathrm{M}_{4}(\mathbb{R})$ with characteristic polynomial $t^{4}-t$. What is the characteristic polynomial of $A^{2}$ ? $t^{4}-t$ $t^{4}-2 t^{3}+t^{2}$ $t^{4}-t^{2}$ None of the other three options Others tifrmaths2022 + – admin asked Sep 9, 2022 • edited Mar 20, 2023 by Lakshman Bhaiya admin 192 views answer comment Share Follow See all 0 reply Please log in or register to add a comment.