haileyyob2287 haileyyob2287 13-05-2023 Mathematics contestada .5. Let A and B be n x n matrices. Is (A+B)^2=A^2+2AB+B^2? If true, prove it. If false, explain why and give a correct version. 8. Find a nonzero matrix A whose square is O. Find a matric whose square is nonzero but whose cube is O.