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  2. Quadratic equation - Wikipedia

    en.wikipedia.org/wiki/Quadratic_equation

    Figure 1. Plots of quadratic function y = ax 2 + bx + c, varying each coefficient separately while the other coefficients are fixed (at values a = 1, b = 0, c = 0). A quadratic equation whose coefficients are real numbers can have either zero, one, or two distinct real-valued solutions, also called roots.

  3. Pythagoras - Wikipedia

    en.wikipedia.org/wiki/Pythagoras

    Pythagoras of Samos [a] (Ancient Greek: Πυθαγόρας; c. 570 – c. 495 BC) [b] was an ancient Ionian Greek philosopher, polymath, and the eponymous founder of Pythagoreanism.

  4. Kata - Wikipedia

    en.wikipedia.org/wiki/Kata

    Kata originally were teaching and training methods by which successful combat techniques were preserved and passed on. Practicing kata allowed a company of persons to engage in a struggle using a systematic approach, rather by practicing in a repetitive manner the learner develops the ability to execute those techniques and movements in a natural, reflex-like manner.

  5. Environmental, social, and governance - Wikipedia

    en.wikipedia.org/wiki/Environmental,_social,_and...

    Environmental, social, and governance (ESG) is shorthand for an investing principle that prioritizes environmental issues, social issues, and corporate governance. [1] ...

  6. Hagia Sophia - Wikipedia

    en.wikipedia.org/wiki/Hagia_Sophia

    Hagia Sophia (Turkish: Ayasofya; Ancient Greek: Ἁγία Σοφία, romanized: Hagía Sophía; Latin: Sancta Sapientia; lit. ' Holy Wisdom '), officially the Hagia Sophia Grand Mosque (Turkish: Ayasofya-i Kebir Cami-i Şerifi; Greek: Μεγάλο Τζαμί της Αγίας Σοφίας), is a mosque and former church serving as a major cultural and historical site in Istanbul, Turkey.