Electronic Calculators: which notation is the better?

[Wes Loewer]

(02-09-2020 01:19 PM)pinkman Wrote:  I’ve always been on the RP[N|L] side since I discovered its usage.
But the Prime opened my eyes to the textbook notation and its strong benefit: verification.

Years ago, there was an RPN app for the TI-89 calculator which gave you the best of both worlds. As you entered your values, the intermediate results would show up on the right hand side like usual, but the left hand side would show the algebraic equation that had been built thus far.

So if a=1, b=2, c=-3, then entering:
b NEG b 2 ^ 4 a * c * - √ + 2 a * /
it would show: