Solution - Factoring multivariable polynomials

Step  1  :

Equation at the end of step  1  :

  2a -  (4b -  (3a -  (2c4 • b)))

Step  2  :

Trying to factor a multi variable polynomial :

 2.1    Factoring    5a - 2bc⁴ - 4b 

Try to factor this multi-variable trinomial using trial and error 

 Factorization fails

Final result :

  5a - 2bc4 - 4b