Form 4 Chapter 2

Form 4 Notes
Chapter 2 Quadratic Expression and Equations

1) A quadratic expression is an expression of the form ax2 + bx + c = 0 where a, b and c are constants, a does not qual to 0 and x is an unknown.

2) A quadratic expression has only one unknown and the highest power of the unknown in the expression is 2.

3) Multiplying two linear expressions having the same unknown will form a quadratic expression.
    Example; (x+5)(x-4)
                    = x2- 4x + 5x - 20
                    = x2 + x - 20

4) The process of writing a quadratic expression as a product of two linear expressions is known as factorisation. 

For more on Quadratic Expression and Equations, click the link below.

http://www.youtube.com/watch?v=O6uoregIrX0

Done by, Suraya Azhar