Find a basis B (fancy B) of R^2 such that the B-matrix (fancy B) of the linear transformation
T(x) = [-5 -9
4 7]x (Where x is a vector) is B (regular B) = [1 1
0 1]
They give [-9 and [0 as an example of an answer. Just not sure how
6] 1] they get that answer.