Question

Solve the given fourth-order differential equation D^4y-D^3y-9D^2y+9Dy=0

Answer 1

\[m^4-m^3-9m^2+9m=0\]

Answer 2

Then I factored it out which gives me \[m(m^3-m^2-9m+9)=0\]

Answer 3

This is where I am lost

Answer 4

Try factoring out m-1