User talk:178.9.255.136

May 2021
Hello, I'm Anita5192. I noticed that you added or changed content in an article, Quadratic formula, but you didn't provide a reliable source. It's been removed and archived in the page history for now, but if you'd like to include a citation and re-add it, please do so. You can have a look at the tutorial on citing sources. If you think I made a mistake, you can leave me a message on my talk page. Thank you. — Anita5192 (talk) 16:44, 23 May 2021 (UTC)