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Introduction of Quadratic Equations
An equation of the form anxn + an – 1xn – 1 + an – 2xn – 2 + …. + a1x + a0 = 0 (a0, a1…., an are real coefficients and an ≠ 0) is called a polynomial equation of degree n. This equation is called a linear equation if n=1, quadratic equation if n=2, cubic equation if n=3, bi-quadratic equation if n=4…and so on.
An equation of the form ax2 + bx + c = 0, where a ≠ 0 and a, b, c are real numbers, is called a quadratic equation. The numbers a, b, c are called the coefficients of the quadratic equation.
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