Quadratic Equations – Introduction

What is a Quadratic Equation?

  1. A quadratic equation is a polynomial equation of the second degree. 
  2. A quadratic equation has only one variable 
  3. The highest power of the variable is 2.
Example of Quadratic Equation
The followings are some examples of quadratic equations
  • 2 x 2 + 3 x + 4 = 0
  • t 2 = 2 5
  • y ( 6 y 3 ) = 5
  • a 3 y + 2 y 2 = 2 where a is a constant.
Example of Non Quadratic Equation
  • 2 x + 1 = 0 , (Reason: The highest power of x ≠ 2.)
  • 2 x 3 + 1 = x , (Reason: The highest power of x ≠ 2.)
  • t 2 + 5 t = 3 , (Reason: The present of the term 5 t .)


Example 1

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