Question 77054
The given expression is: 


{{{y^16 - y^12}}} 


This can be written as:  


{{{ ((y^8)^2) - ((y^6)^2) }}} 


This above equation is of the form {{{ a^2 - b^2}}} which can be written as: 


(a + b) * (a - b)



==>  {{{((y^8) + (y^6)) * ((y^8) - (y^6)) }}} 


Thus, the expansion.(complete factorisation)


Hence, the solution.