{"id":4189,"date":"2024-12-07T09:31:05","date_gmt":"2024-12-07T14:31:05","guid":{"rendered":"https:\/\/josmfs.net\/?p=4189"},"modified":"2024-12-07T09:31:05","modified_gmt":"2024-12-07T14:31:05","slug":"mystery-quadratic","status":"publish","type":"post","link":"https:\/\/josmfs.net\/wordpress\/2024\/12\/07\/mystery-quadratic\/","title":{"rendered":"Mystery Quadratic"},"content":{"rendered":"<p><img loading=\"lazy\" decoding=\"async\" class=\"alignleft  wp-image-4185\" src=\"https:\/\/josmfs.net\/wordpress\/wp-content\/uploads\/2024\/12\/Mystery-Quadratic-Fig2.jpg\" alt=\"\" width=\"200\" height=\"201\" srcset=\"https:\/\/josmfs.net\/wordpress\/wp-content\/uploads\/2024\/12\/Mystery-Quadratic-Fig2.jpg 401w, https:\/\/josmfs.net\/wordpress\/wp-content\/uploads\/2024\/12\/Mystery-Quadratic-Fig2-298x300.jpg 298w, https:\/\/josmfs.net\/wordpress\/wp-content\/uploads\/2024\/12\/Mystery-Quadratic-Fig2-150x150.jpg 150w\" sizes=\"auto, (max-width: 200px) 100vw, 200px\" \/>Presh Talwalkar has an interesting new <a href=\"https:\/\/mindyourdecisions.com\/blog\/2024\/12\/01\/new-zealand-test-leaves-students-in-tears\">problem<\/a>.<\/p>\n<p>\u201cStudents and teachers found a recent test in New Zealand to be confusing and challenging for covering topics that were not taught in class.<\/p>\n<p>For the equation below, find the value of <em>k<\/em> for which the equation has numerically equal but opposite signs (for example, 2 and \u20132):<img loading=\"lazy\" decoding=\"async\" class=\"wp-image-4188 aligncenter\" src=\"https:\/\/josmfs.net\/wordpress\/wp-content\/uploads\/2024\/12\/Mystery-Quadratic-Equation.jpg\" alt=\"\" width=\"115\" height=\"51\" \/>\u201d<\/p>\n<p>The problem didn\u2019t mention how old the students were, but the solution to another problem on the test indicates they needed to know calculus.<\/p>\n<p><a href=\"https:\/\/josmfs.net\/wordpress\/wp-content\/uploads\/2024\/12\/Mystery-Quadratic-Answer.jpg\">Answer<\/a>.<\/p>\n<p>See <a href=\"https:\/\/josmfs.net\/wordpress\/wp-content\/uploads\/2024\/12\/Mystery-Quadratic-241204.pdf\">Mystery Quadratic<\/a> for a solution.<\/p>\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Presh Talwalkar has an interesting new problem. \u201cStudents and teachers found a recent test in New Zealand to be confusing and challenging for covering topics that were not taught in class. For the equation below, find the value of k for which the equation has numerically equal but opposite signs (for example, 2 and \u20132):\u201d [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[133,17],"class_list":["post-4189","post","type-post","status-publish","format-standard","hentry","category-puzzles-and-problems","tag-algebra","tag-presh-talwalkar"],"_links":{"self":[{"href":"https:\/\/josmfs.net\/wordpress\/wp-json\/wp\/v2\/posts\/4189","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/josmfs.net\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/josmfs.net\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/josmfs.net\/wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/josmfs.net\/wordpress\/wp-json\/wp\/v2\/comments?post=4189"}],"version-history":[{"count":3,"href":"https:\/\/josmfs.net\/wordpress\/wp-json\/wp\/v2\/posts\/4189\/revisions"}],"predecessor-version":[{"id":4192,"href":"https:\/\/josmfs.net\/wordpress\/wp-json\/wp\/v2\/posts\/4189\/revisions\/4192"}],"wp:attachment":[{"href":"https:\/\/josmfs.net\/wordpress\/wp-json\/wp\/v2\/media?parent=4189"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/josmfs.net\/wordpress\/wp-json\/wp\/v2\/categories?post=4189"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/josmfs.net\/wordpress\/wp-json\/wp\/v2\/tags?post=4189"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}