https://www.khanacademy.org/math/algebra-1-tx-teks-imra-2026-publisher-initiated-changes/x77e86bfa312010ae:investigation-and-application-of-quadratic-functions 2026-07-22T12:21:28.248165541Z Quadratic equations and simplification of radical expressions We've seen and explored linear functions, and now we're ready for quadratic functions. Let's investigate how we can use roots and radicals to solve them. **Unit guides are here!** Power up your classroom with engaging strategies, tools, and activities from Khan Academy’s learning experts. [**PDF**](https://bit.ly/3WDFQ2g) unit