Question

solve (D^2+2D+1)y=x^2cosx​

Answer 1

Answer:

y=ge-x+c2ex-Cosx

Step-by-step explanation:

D2-1=2cosx

m2-1=0

m=-1,1

CF=C,e-x+c2ex

PI=1/D2-1 2cosx

2/-2cosx

-cosx

complete solution

y=ge-x+ c2ex-Cosx