Unit 1

In this Chapter, students will be able to:
1. Solve quadratic equations by factorizing
2. Solve quadratic equations by the use of the formula
3. Solve problems involving quadratic equations

Quadratic Equations

Chapter 3

Quadratic Equation example

The standard form of a quadratic equation looks like:

 ax² + bx + c =0

• a, b and c are known as values
• a can't be 0
• x is the variable or unknown

To solve quadratic equations, you need to gather all the terms to one side. Factorize, then solve the two resulting simple equations.

These can be solved by simple factorization. However, sometimes, you need this 'completing square' method in order to solve an equations. 

There is another method to solve those equations which is called the general formula. As the name, you just need to insert some of the variables into the formula given. 

Solve x2 + 3x – 4 = 0

It means, the answers are x= -4 or x=1