Edexcel IGCSE Maths 复习笔记 2.2.2 Simple Factorisation

Edexcel IGCSE Maths 复习笔记 2.2.2 Simple Factorisation

What is simple factorisation?

Simple Factorisation is the opposite of Expanding One Bracket

Beware of minus signs

Remember the basic rules:

“ − × − = + ”

“ − × + = − ”

How to factorise

• Write each term in factorised form
• Identify the common factors
• Write those factors outside a bracket
• Write everything else inside the bracket 

  You can check your answer by multiplying out (in your head!)

Worked Example

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