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## Homework Statement

**Find general solution of the given problem in the pic**

## Homework Equations

All I need to know is where they found the fundamental set of solutions.

## The Attempt at a Solution

All I need to know is where they found the fundamental set of solutions. Please see pic. All I want to know is where did the x1 and x2 come from. If I have those then I can do the rest.

See attachment image.