Need help with Difference Equation

Hi. We are asked by our teacher to create a Matlab program that solves for the first 10 terms given the LCCDE. This is to be done iteratively:

3y(n) - y(n-1) + y(n-2) = -x(n)
x(n) = n^2 u(n)
y(-1)=-2
y(-2)=1

Answer 1

[Azzi Abdelmalek]

You can use a for loop, because Matlab does not allow indices <=0 you should begin your for loop with k=3. then your initial conditions will be y(1)=1 and y(2)=-2