Please do not post image files as the main content of a question, state the question in plain text and TeX code (MathJax, explained in the how-to-post FAQ).
Images interfere with the automatic identification of Related questions (side column of links) and possible duplicates (the menu when posting), and with searches (box on top right of screen). All those are based on keywords in the text. It also interferes with search engine indexing if the image has content not readable by OCR.
Please do post the reference information such as textbook name, author, edition and problem number. That will help others who use the same book find things with a search engine.
If the question fits in the category of solution-verification or proof-verification please consider using those tags.
It is totally optional whether to indicate that a question is homework, but if you provide that information, please do it by using the tag homework and not by writing phrases with the word "homework" in the question and title. Generally, tags add value, but writing anything that could be a tag as text, subtracts value.