For the given matrix H in M2(R) and for any real number r let Vsubr denote the solution space in M2(R) of the equation
Find a basis for Vsub2 given that
H = 
Okay. So I had some difficulty typing this question so it looks really awkward. But I think you can figure out what I'm doing. H is a 2X2 matrix.
[zw] is supposed to be a 2x2 matrix also.