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Math Help - Differential equation system (Please HELP)

  1. #1
    Newbie
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    May 2010
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    Differential equation system (Please HELP)

    Hi

    In few hours I got an exam in Differential equations

    1 really need help with these to differential equation systems (I am not sure how to solve them). Please help ,me !!!!!!!!!!!!!!!!!

    1)

    x'+2x+3y=0

    3x+y'+2y=2*e^(2t) , x=x(t), y=y(t)




    2)

    y1'= -2*y1-4*y2+1+4x

    y2'= -y1+y2+(3/2)x^2


    Thank you in advance for any help !!!!!!!
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  2. #2
    Senior Member
    Joined
    Mar 2010
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    y=-\frac{1}{3}(x'+2x)
    y'=-\frac{1}{3}(x''+2x')
    Please inserte this to the second equation.
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