Hi,

I have tried to analyse this question but I dont know how to get the answer for tr B and det B (5 and 0 respectively)

The eigenvalues of a certain 2 × 2 matrix A are –2 and 3. Let

B = A^2 – 2A – 3I .

What are the values of the trace and the determinant of B? Show how you

obtained your answers.