This is pyq from the exam that I'm preparing for.

[cedar junco]

Thanks in advance

[deft moon]

Use the characteristic polynomial

[knotty jetty]

Hint:

$\newline\det\left(\begin{matrix}
A & B \
B & A
\end{matrix}\right)
= \det(A+B)\cdot\det(A-B)$

[knotty goblet]

solarunes

[feral axle]

everyone is overcomplicating it a lot

Suppose that Av = cv.

Try and figure out how to make a new vector, using v, that you can put into the new matrix

[cedar junco]

yep i got it now

thanks

@deft moon @knotty jetty @feral axle Thanks guys

[noble star]

!done

[simple furnace]

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[noble star]

.solved