# Math 308 - Chapter 1-3

<aside>Spring 2021, Dr. Kamran Reihani, Texas A&M University</aside>

$$y = c_1y_1 + c_2y_2 + \left(\int {-gy_2 \over W(y_1,y_2)}\right)y_1 + \left(\int {gy_1 \over W(y_1,y_2)}\right)y_2$$

## Sections

- [Intro to Differential Equations](Intro_to_DEs.html)
- [Classifying DEs and Direction Fields](Classifying_DEs.html)
- [Standard Form](Equil_StdForm.html)
- [Physical Models](Models.html)
- [Separable Equations](Separable.html)
- [Linear vs. Non-Linear](Linear_v_Non.html)
- [Autonomous Equations](Autonomous.html)
- [Differential Form and Exact Equations](Differential_Form.html)
- [Homogenous Second Order Equations](Second_Ord.html)
- [Uses of the Wronskian](Wronskian_Uses.html)
- [Complex Roots of the Characteristic Formula](Complex_Roots.html)
- [Repeated Roots of the Characteristic Formula](Repeated_Roots.html)
- [Quasi-Polynomial Non-Homogenous Equations](Quasi_Polynomial.html)
- [Variation of Parameters and Lagrange](Variation_of_parameters.html)

### Summary

- [Summary](Summary.html)

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