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