DIFFERENTIAL equation

[marble fern]

Guys is this correct?

[little pumice]

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[lyric badger]

it is true

correct*

[ashen ginkgo]

-9 doesnt depend on y or t, so just integrate -9 twice

idk why trig showed up, it's not a SHO equation

[lyric badger]

what?

or he is right

or she

the 9 is without the y

if the equation is with the y then its alright otherwise she is right

or he

[ashen ginkgo]

if you're unsure of pronouns, you can either say they, or check pronoun roles...

instead of floundering

[marble fern]

so its wrong if i write the associated equation t^2 + 9 = 0?

[ashen ginkgo]

Yes

[ashen ginkgo]

Cause that's not the characteristic polynomial of y''=-9

That's the char poly of y''+9y=0

[marble fern]

wait wouldnt it be t^2 + 9t = 0 for that?

[ashen ginkgo]

no

$(e^{rt})''+9(e^{rt})=(r^2+9)e^{rt}$

[unreal socket]

Omegabet_