eigenvalue = -7 mult 1 eigenvalue = -3 mult 4 eigenvalue = -2.64575 mult 8 eigenvalue = -1.73205 mult 8 eigenvalue = -1 mult 3 eigenvalue = 1 mult 3 eigenvalue = 1.73205 mult 8 eigenvalue = 2.64575 mult 8 eigenvalue = 3 mult 4 eigenvalue = 7 mult 1