In algebra, letters are used when numbers are not known. Algebraic terms, such as \(2s\) or \(8y\), leave the multiplication signs out. So rather than \(2 \times s\), write \(2s\), and rather than \(8 ...

To factorise this expression, look for the HCF of \(6x\)and 9 which is 3. To factorise, write down the HCF and then begin a set of brackets. Find the missing terms in the brackets by dividing each of ...