the book says
Determine for which values of m the function
y=exp(mx) is solution of differential equation
y'' + 6y' + 5y=0
Plz help me
Hello, moonnightingale!
. .
In effect, you are given a differential equation and an answer.
. . You are asked to check the answer.
You don't know how to do that?
Differentiate: .
Substitute into the differential equation:
. .
Divide by
. .
Can you finish it now?