https://www.khanacademy.org/math/algebra/x2f8bb11595b61c86:quadratic-functions-equations/x2f8bb11595b61c86:more-on-completing-square/v/solve-completing-square-integer-solutions 2022-09-10T01:04:29.754011735Z Solve by completing the square: Integer solutions We can use the strategy of completing the square to solve quadratic equations. If the solutions are integers, we can solve by factoring as well. Sal Khan video https://cdn.kastatic.org/ka_thumbnails_cache/d0ed036b-ffee-4fdf-898d-dfc1967f993a_1280_720_base.png Solve by completing the square: Integer solutions We can use the strategy of completing the square to solve quadratic equations. If the solutions are integers, we can solve by factoring as well. https://cdn.kastatic.org/ka-youtube-converted/eU41vG9z35M.mp4/eU41vG9z35M.mp4 389 More on completing the square https://www.khanacademy.org/math/algebra/x2f8bb11595b61c86:quadratic-functions-equations/x2f8bb11595b61c86:more-on-completing-square/v/solve-completing-square-non-integer-solutions 2022-09-10T01:04:29.754011735Z Solve by completing the square: Non-integer solutions We can use the strategy of completing the square to solve quadratic equations even when the solutions aren't integers. Sal Khan video https://cdn.kastatic.org/ka_thumbnails_cache/62b67f95-76b4-4289-8785-edb115354075_1280_720_base.png Solve by completing the square: Non-integer solutions We can use the strategy of completing the square to solve quadratic equations even when the solutions aren't integers. https://cdn.kastatic.org/ka-youtube-converted/Ldp9_K3L4Q8.mp4/Ldp9_K3L4Q8.mp4 242 More on completing the square https://www.khanacademy.org/math/algebra/x2f8bb11595b61c86:quadratic-functions-equations/x2f8bb11595b61c86:more-on-completing-square/e/solve-completing-square 2025-09-02T23:00:39.251995325Z Solve equations by completing the square Practice solving quadratic equations by completing the square. Jeff Dodds exercise https://www.khanacademy.org/math/algebra/x2f8bb11595b61c86:quadratic-functions-equations/x2f8bb11595b61c86:more-on-completing-square/v/proof-of-quadratic-formula 2021-06-30T17:32:38Z Proof of the quadratic formula Sal proves the quadratic formula using the method of completing the square. Sal Khan video https://cdn.kastatic.org/googleusercontent/CTdKwqBQ1YrTcbA80JUfi-LzbCaaFguVSd_-xctPRcoyDZC5aKSTra46tvNl9t-SS1PUJy_3D3bkQk8Z0X7YvTVKww Proof of the quadratic formula Sal proves the quadratic formula using the method of completing the square. https://cdn.kastatic.org/ka-youtube-converted/r3SEkdtpobo.mp4/r3SEkdtpobo.mp4 464 More on completing the square https://www.khanacademy.org/math/algebra/x2f8bb11595b61c86:quadratic-functions-equations/x2f8bb11595b61c86:more-on-completing-square/a/solving-quadratic-equations-by-completing-the-square 2023-11-10T19:13:09.242227712Z Solving quadratics by completing the square For example, solve x²+6x=-2 by manipulating it into (x+3)²=7 and then taking the square root. article https://www.khanacademy.org/math/algebra/x2f8bb11595b61c86:quadratic-functions-equations/x2f8bb11595b61c86:more-on-completing-square/a/completing-the-square-review 2021-06-30T17:32:35Z Completing the square review Completing the square is a technique for factoring quadratics. This article reviews the technique with examples and even lets you practice the technique yourself. article https://www.khanacademy.org/math/algebra/x2f8bb11595b61c86:quadratic-functions-equations/x2f8bb11595b61c86:more-on-completing-square/a/quadratic-formula-proof-review 2021-06-30T17:32:37Z Quadratic formula proof review A text-based proof (not video) of the quadratic formula article