Solution - Simplification or other simple results

Step  1  :

Step  2  :

Pulling out like terms :

 2.1    Simplify ( 6m-2n )²

Put the exponent aside and simplfy the base by pulling out like factors :
 6m-2n  =  2 • (3m-n) 

Remember the 4th law of exponents : (a • b)^m= a^m• b^m

Retract the exponent and apply the 4th law to the simplified base: ( 2 • (3m-n) )² =  (2)² • (3m-n)²  

Final result :

  (2)2 • (3m - n)2