Pearson (or the current rights holder) provides a full instructor’s solution manual. It is not legal to distribute publicly. If you are a tutor or instructor, you can request access. If you’re a student, ask your professor for selected problem solutions.
While the textbook is still available, the original solution manual can be rare. However, many academic resources and document-sharing platforms have curated solutions for this text. Tips for Finding a Verified Copy: modern control theory brogan solution manual verified