CBSE Class 11 Maths Notes: Quadratic Equations – Introduction

Introduction of Quadratic Equations

An equation of the form a_nxⁿ + a_{n – 1}x^{n – 1} + a_{n – 2}x^{n – 2} + …. + a₁x + a₀ = 0 (a₀, a₁…., a_n are real coefficients and a_n ≠ 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.

DEFINITION
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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