Solving Quadratic Equations

Solving Quadratic Equations

To solve a quadratic equation means to find all the roots of the quadratic equations.

Example:
Find the roots of the quadratic equations
a. x 2 = 9
b. 2 x 2 98 = 0

Answer:
 (a)
x 2 = 9 x = ± 9 x = ± 3

(b)
2 x 2 98 = 0 2 x 2 = 98 x 2 = 98 2 = 49 x = ± 49 = ± 7

A quadratic equation may be solve by using one of the following method
  1. Factorisation
  2. Completing the square
  3. Using quadratic formula