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Rubik
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Homework Statement
Solve the following inital value problem
y1' = y2
y2' = -5y1-4y2
with inital conditions y1(0) = 1, y2(0) = 0
Homework Equations
(A-[itex]\lambda[/itex]I)x = 0
The Attempt at a Solution
So I first started by setting out like this
y2' = -5y1 - 4y2
which then suggest 0 = -[itex]\lambda[/itex](-4-[itex]\lambda[/itex]) + 5
0 = [itex]\lambda[/itex]2+4[itex]\lambda[/itex] + 5
But this is going to give me complex roots.. so I was just wondering have I made a mistake in my characteristic equation?