Factorising is the reverse of expanding brackets, so it is, for example, putting 2x² + x - 3 into the form (2x + 3)(x - 1). This is an important way of solving quadratic equations. The first step of factorising an expression is to 'take out' any common factors which the terms...
See also: Quadratic equations3. Difference of two squares Factorising example using difference of two squares: To factorise fully: \[\color{#FE47EC}4x^2 -\color{#7C4DFF}{ 9}\] Write down 2 brackets. \[(\qquad)(\qquad)\] 2 Square root the first term and write it on the left-hand...