Solution - Factoring multivariable polynomials

Step  1  :

Equation at the end of step  1  :

  ((22•32x2) -  a211) -  25

Step  2  :

Step  3  :

Pulling out like terms :

 3.1     Pull out like factors :

   -a²¹¹ + 36x² - 25  =   -1 • (a²¹¹ - 36x² + 25) 

Trying to factor a multi variable polynomial :

 3.2    Factoring    a²¹¹ - 36x² + 25 

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

 Factorization fails

Final result :

  -a211 + 36x2 - 25