So, by all means, seek out the solutions manual. But seek it through legal channels: your library, your professor, or a paid study service. Then, use it with integrity. Your future self—designing a filter, tuning a control loop, or debugging a communication link—will thank you.
: There are many online resources, including video lectures, study groups, and forums (like Reddit's r/learnmath and r/signalsandsystems), that can provide additional explanations and insights. So, by all means, seek out the solutions manual