- #1
darryw
- 127
- 0
Homework Statement
determine the gen sol of the DE
[tex]x^2y'' - 5xy' + 9y = 0 [/tex]
Q/P = A = -5 and R/P = B = 9
then use y = x^r in original DE...
y' = rx^(r-1)
y'' = (r-1)rx^(r-2)
insert into DE
[tex]
x^2 (r-1)rx^{r-2} - 5x(rx^{r-1})+ 9x^r = 0
[/tex]
i am confused as to how to proceed.. it looks like a characteristic, but do i separate the x's or what?? please help thanks