D = or
Since each of the roots of the characteristic equation have multiplicity 1, we can tell that the matrix is similar to any matrix with those roots on the diagonal and 0s elsewhere.
A.) Determine the characteristic polynomial and characteristic roots of A.
For this, I got and Roots: X=4 and X=2
I'm not sure what to do for the next part.
B.) Find a nonsingular matrix P and diagonal matrix D such that .