the book says

Determine for which values of m the function

y=exp(mx) is solution of differential equation

y'' + 6y' + 5y=0

Plz help me

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- October 5th 2011, 06:57 AMmoonnightingaleVerify Solution
the book says

Determine for which values of m the function

y=exp(mx) is solution of differential equation

y'' + 6y' + 5y=0

Plz help me - October 5th 2011, 07:31 AMSorobanRe: Can u helpmefor this question of differential equations
Hello, moonnightingale!

Quote:

. .

In effect, you are given a differential equation**and**an answer.

. . You are asked to check the answer.

You don't know how to do that?

Differentiate: .

Substitute into the differential equation:

. .

Divide by

. .

Can you finish it now?

- October 5th 2011, 08:43 AMHallsofIvyRe: Can u helpmefor this question of differential equations
It is important to note that is never 0 so you

**can**divide by it.