Solution - Simplification or other simple results

Step  1  :

Step  2  :

Pulling out like terms :

 2.1    Simplify ( 6y-10 )²

Put the exponent aside and simplfy the base by pulling out like factors :
 6y-10  =  2 • (3y-5) 

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 • (3y-5) )² =  (2)² • (3y-5)²  

Final result :

  (2)2 • (3y - 5)2