SubArea: Higher degree equations and inequalitiesLevel: AProject ID: 2000003803Accepted: 0Clonable: 0Easy: 1Assuming \(x\in \mathbb{R}\), find the solution set of the following equation. \[ (x^2+1)(x^2-4)=0 \]\( \{-2;2\}\)\( \{-2;-1;1;2\}\)\( \{-2;-1;2\}\)\( \{-1;2\}\)