Maths Dictionary · JSS 2, JSS 3
Factorise
Simple meaning
To write an expression as a product by putting it into brackets: the opposite of expanding.
Example
6x + 9 = 3(2x + 3); x2 − 9 = (x + 3)(x − 3).
See it
From the Factorising Simple Expressions lesson. Try moving things around.
Find the sides for area 12x + 18
Each part's area = its side × its top. Dashed pink parts are negative.
Sides: 2(6x + 9)
Parts: 12x + 18
Area = 12x + 18
Outside number2
Your task
Good — but 3 still goes into both terms in the bracket. Take out a bigger factor.