0 votes 0 votes Prove that $m^2 = n^2$ if and only if $m=n$ or m = -n. Mathematical Logic kenneth-rosen discrete-mathematics mathematical-logic propositional-logic + – Pooja Khatri asked Apr 4, 2019 Pooja Khatri 207 views answer comment Share Follow See all 0 reply Please log in or register to add a comment.