Solution - Simplification or other simple results

Step  1  :

Equation at the end of step  1  :

  7x +  (0 -  5x2)

Step  2  :

Step  3  :

Pulling out like terms :

 3.1     Pull out like factors :

   7x - 5x²  =   -x • (5x - 7) 

Final result :

  -x • (5x - 7)