Question

find a general solution to
(D^4+4)y=0
please and promise i will guide u in a tour at elbaghl restaurant with chef president Ahmed Salmoun

Answer 1

is that d to the fourth power?

Answer 2

yup :)

Answer 3

So, you're working on fourth order diff eqn?

Answer 4

yup :)

Answer 5

factor D^4+4 first,

Answer 6

Are you there @zeki ?

Answer 7

yeah with u ... i am just so exhausted sorry

Answer 8

then ?

Answer 9

So, did u find the factors?

Answer 10

No i feel like being against a nuclear reactor

Answer 11

Okay, let me help:
D^4+4=D^4-(2i)^2=(D^2+2i)(D^2-2i)

Answer 12

ooooooooooooooooh ! finally i got it .. so many thanks :) that is what i missed

Answer 13

No probs :)