- #1
Dissonance in E
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Hi, I am just looking for clarification whether or not I am doing these problems correctly, here's an example:
Find the general solution to
x'' -2x' + 5x = 0
Charasteristic polynomial.
Quadratic equation.
General solution form for complex roots.
form the char polynomial:
m^2 -2m +5 = 0
Solve for roots:
(-2 (+-)SQRT(2^2 - 4(1)(5)))/2
-1+SQRT(-16)
-1-SQRT(-16)
m1 = -1+4i
m2 = -1-4i
Insert into general solution form:
y = (e^ax)(Acoswx + Bsinwx)
y = (e^-1x)(Acos4ix + Bsin4ix)
General solution: (?)
y = (e^-x)(Acos4ix + Bsin4ix)
Homework Statement
Find the general solution to
x'' -2x' + 5x = 0
Homework Equations
Charasteristic polynomial.
Quadratic equation.
General solution form for complex roots.
The Attempt at a Solution
form the char polynomial:
m^2 -2m +5 = 0
Solve for roots:
(-2 (+-)SQRT(2^2 - 4(1)(5)))/2
-1+SQRT(-16)
-1-SQRT(-16)
m1 = -1+4i
m2 = -1-4i
Insert into general solution form:
y = (e^ax)(Acoswx + Bsinwx)
y = (e^-1x)(Acos4ix + Bsin4ix)
General solution: (?)
y = (e^-x)(Acos4ix + Bsin4ix)