In the quickref for linear algebra, it is writen that, if f(x) = x^2 + 5*x+3 then f(B) is possible.
I have tried
B=matrix([[1/2,2/3],[1/2,1/3]])
f(B)
but it returns an error when B^2 + 5*B + 3 returns
[34 31 33 27]
[31 34 32 28]
[27 25 43 30]
[32 32 31 30]
I'm wondering?
