For which values of constants a, b, and c are the matrices fa Exercises 21 through 30 diagonalizable?

5o\tP lCC,, Y 6. ltv) - It(.,at x I v X= L\ fl '=\crc \rJ ^Y eq: x ae&s \^.e* 1\o!t(14* .-f H*r u\-- ;1*-->. \) (c',,',=1 'R Co;>7 p),n\: 5w,\ch \ c, fr"^ 1ruro,rb+L il