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A quadratic equation is of the form

ax^2+bx+c.=0.The above quadratic equation is a polynomial since it consist Given the cosine or sine of an angle, finding the cosine or sine of the angle that is half as large involves solving a quadratic equation.of one unknown variable.Descartes' theorem states that for every four kissing (mutually tangent) circles, their radii satisfy a particular quadratic equation.they are basically used to solve mathematical problems Please let me know if you need any clarification. I'm always happy to answer your questions.