Джерела

1. http://uk.wikipedia.org/wiki/%D0%9A%D0%B2%D0%B0%D0%B4%D1%80%D0%B0%D1%82%D0%BD%D0%B5_%D1%80%D1%96%D0%B2%D0%BD%D1%8F%D0%BD%D0%BD%D1%8F
2. http://ru.onlinemschool.com/math/assistance/equation/quadratic/
3. http://osvita.ua/school/lessons_summary/math/7286/
4. www.kname.edu.ua/images/.../Matemat.doc‎
5. http://posibnyky.vntu.edu.ua/web-m/tema17.html
6. http://shkolyar.in.ua/kvadratni-rivnyannya8
7. http://www.matklas.com.ua/uroki-matematiki/kvadratn-r-vnyannya-uzagalniuiuchiy-urok-v-8-klas
8. http://znaimo.com.ua/%D0%9A%D0%B2%D0%B0%D0%B4%D1%80%D0%B0%D1%82%D0%BD%D0%B5_%D1%80%D1%96%D0%B2%D0%BD%D1%8F%D0%BD%D0%BD%D1%8F
9. http://ua-referat.com/%D0%9A%D0%B2%D0%B0%D0%B4%D1%80%D0%B0%D1%82%D0%BD%D1%96_%D1%80%D1%96%D0%B2%D0%BD%D1%8F%D0%BD%D0%BD%D1%8F_%D1%82%D0%B0_%D1%80%D1%96%D0%B2%D0%BD%D1%8F%D0%BD%D0%BD%D1%8F_%D0%B2%D0%B8%D1%89%D0%B8%D1%85_%D0%BF%D0%BE%D1%80%D1%8F%D0%B4%D0%BA%D1%96%D0%B2
10. http://yukhym.com/uk/kompleksni-chisla/89-kvadratne-rivnyannya-z-kompleksnimi-koefitsientami.html
11. http://vidpo.net/jak-obchisliti-diskriminant-kvadratnogo-rivnjannja.html
12. http://www.youtube.com/watch?v=x5mQkkb_NGE