Question

Solve D^3+D^2+ 4D +4 =0​

Answer 1

First we find auxiliary equation of given equation....

m^3+m^2+4m+4 = 0

m^2(m+1)+4(m+1) = 0

(m+1) = -1

(m^2+4) = +2i ( complex number)

So it's complementry function will be

c1e^-x+ c2cos2x + c3sin2x)

option c Will be correct

Answer 2

Answer:

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