The video tutorial explains the classification of differential equations based on the number of unknown functions involved. It introduces systems of differential equations and demonstrates how to verify solutions for these systems through examples. The process involves finding derivatives, applying the chain rule, and ensuring both sides of the equations match. Two examples are provided: one for a first order system and another for a second order system. The video concludes with a preview of the next topic, initial value problems.

What is required when dealing with two or more unknown functions in differential equations?

• A single equation

• A quadratic equation

• A system of equations

• A linear equation

In the context of systems of differential equations, what is analogous to finding an ordered pair in algebra?

• Finding a polynomial solution

• Finding a constant solution

• Finding a pair of functions

• Finding a single function

What is the first step in verifying a solution to a system of differential equations?

• Finding the derivatives

• Solving the equations

• Graphing the functions

• Integrating the functions

When verifying the first example, what is done after finding the derivatives?

• Solving for constants

• Finding the integral

• Substituting into the system

• Graphing the functions

In the second example, what type of derivatives are involved?

• No derivatives

• Partial derivatives

• First derivatives

• Second derivatives

What is the final step in verifying the second example of a system of differential equations?

• Finding the integral

• Substituting and matching both sides

• Graphing the solution

• Solving for unknowns

What topic is introduced at the end of the video for future discussion?

• Complex analysis

• Initial value problems

• Linear algebra

• Partial differential equations