Question

(d^2y/dx^2) - 4y = 0 This is a separable equation. I do not understand what I am supposed to be doing with the "(d^2y/dx^2)" part. Any ideas?

Answer 1

So you have y''-4y=0

who told you it is separable?

Answer 2

\[r^2-4=0\]
you solve this to get your solutions
if you get r=a and r=b
real a and b are real numbers then your solution is:
\[y=c_1e^{at}+c_2e^{bt}\]

Answer 3

where a and b are real numbers*

Answer 4

any questions?

Answer 5

Just asking because I haven't heard anything from ya.