i got this question in which we are given the matrix T(adsbygoogle = window.adsbygoogle || []).push({});

and we need to find the eigenvalues and the independent spaces (i dont know what is independent space) of T^2 +2*T

the problem is that he started to solve the question as i would have solved it

but then he puts a big X on it and does something else

i cant understand it??(and he gets all the point for it)

it looks as if he skips the finding the roots of polinomial step

why???

http://img253.imageshack.us/my.php?image=img86091xg4.jpg

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# A question about a new way to find eigenvectors that i noticed

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