Answer: Hello!
A second order differential equation has the next shape:
![y''(t) + p(t)y'(t) + q(t)y(t) = g(t)](https://img.qammunity.org/2020/formulas/mathematics/college/68wx10489qqrw9kzbjls3q0nlwe5fmk2cn.png)
where p(t), q(t) and g(t) are functions of t, that can be constant numbers for example.
And is called homogeneus when g(t) = 0, so you have:
![y''(t) + p(t)y'(t) + q(t)y(t) = 0](https://img.qammunity.org/2020/formulas/mathematics/college/wjzypxlhbngdmxqqk2a5scjgvxzwaj4uai.png)
Then a second order differential equation is homogeneus ef every term involve either y or the derivatives of y.