Solution - Simplification or other simple results

Step  1  :

Equation at the end of step  1  :

  7k2 +  9k

Step  2  :

Step  3  :

Pulling out like terms :

 3.1     Pull out like factors :

   7k² + 9k  =   k • (7k + 9) 

Final result :

  k • (7k + 9)