How to do quick calculations for single-variable expression for complex-valued input?

[ijabbott]

(11-13-2018 03:59 AM)Wes Loewer Wrote:  The quickest way to evaluate an expression at a value is to use the vertical bar "where" function, i.e. where x = some value.

x^2+1|x = 2*i

The vertical bar is found on the top row of the templates. On the virtual calculator, just use the vertical bar (pipe) key.

Good idea! That's what I'd use on the TI CAS calculators (where it is called the "with" operator), but I forgot it existed on the Prime.