How to solve two 2nd order differential equations using ode's

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Ebraheem Menda
Ebraheem Menda 2018-2-21
评论： Ebraheem Menda 2018-2-22
my system is as follows. x"+ x'+ x + y'=0; y"+ y'+ y + x'=0; Thanks in advance for the help.

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Birdman
Birdman 2018-2-21
Here is an approach, with symbolic way:
syms x1(t) x2(t)
eq1=diff(x1,2)+diff(x1,1)+x1+diff(x2,1)==0;
eq2=diff(x2,2)+diff(x2,1)+x2+diff(x1,1)==0;
solx=dsolve([eq1,eq2]);
x1(t)=solx.x1
x2(t)=solx.x2
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Birdman
Birdman 2018-2-22
I do not know how to use ode45. Maybe you should open a new question in forum.

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