Question 318938
Can you please help me with these? 
Factor, if possible. (If not possible, enter PRIME.)
y^4-256 =

(y^2 - 16)*(y^2 + 16) =
(y-4)(y+4)*(y^2 + 16)  


and 
Factor, if possible. (If not possible, enter PRIME.)
3u^2-12 =

3*(u^2 - 4) =

3*(u-2)(u+2)



Andy