A = [
a11 a12
a21 a22
]

rank A = ???
det A = ???
tr A = ???

Egval1: ???
Egvec1: ???
Egval2: ???
Egvec2: ???

   Transformed unit square
   Eigenvectors for real eigenvalue
   Eigenvectors for zero eigenvalue
 x Ax

Tested on Chrome version 64.0.3282.186 only.