= to ==, why? [SOLVED]

[compsystems]

(12-10-2016 05:46 AM)Han Wrote:  I still do not understand why you are doing all your calculations using strings when you have direct access to symbolic calculations by the fact that your program is a CAS program. It is as if you had an HP48 installed with an emulator, and the emulator is emulating the HP48. What is the reason for the seemingly unnecessary "extra layer" ?

The firt version "deductionQuadFormula_1()" (works fine), operates directly on symbolic expressions

The second version "deductionQuadFormula_2()" (works fine), to show intermediate steps, is required to convert it to string.
An alternative code may exist

The third version "deductionQuadFormula_3()", same as the previous one but using a subfunction to not repeat code (it does not work).

An alternative code may exist, Who can code it?

Codes updated in the first post

Comparison between the outputs of each version (1 & 2)