Question 1161348
<pre>
First diagonalize matrix A, that is find

D and X such that 

{{{A=X*D*X^(-1)}}}

Left-multiply both sides by X<sup>-1</sup>

{{{X^(-1)*A=X^(-1)*X*D*X^(-1)}}}

Right multiply both sides by X

{{{X^(-1)*A*X=X^(-1)*X*D*X^(-1)*X}}}

Re=group which we can do because matrix multiplication is associative.

{{{X^(-1)*A*X=(X^(-1)*X)*D*(X^(-1)*X)}}}

{{{X^(-1)*A*X=I*D*I)}}}

{{{X^(-1)AX=D}}}

{{{D=X^(-1)*A*X}}}

Now you diagonalize A.  If you need help let me know below
and I'll get back to you by email.

Edwin</pre>