Question

D^4y-32D^2y+256=0 find solutions​

Answer 1

Step-by-step explanation:

D^4y -32D^2y +256 = 0

or, (D^2y)²- 2× 16 D^2y +16²= 0

or, (D^2y-16)²= 0

or, D^2y -16= 0

or, D^2y = 16

or D^y = 4