How to factorise a quadratic expression into two brackets (binomials) including when the coefficient (number in front) of the squared term is more than 1.
A simple example of expanding (multiplying out) double brackets
(x + 3)(x – 4)
For more on this topic, see expanding-double-brackets
Expanding (multiplying out) double brackets using the FOIL method to ensure that all the terms are multiplied.
The expressions in the brackets are called binomials because they consist of two terms that are either added or subtracted.
After multiplying the binomials it is important to simplify the final expression by collecting like terms.