We have already looked at how to expand brackets in algebra. Let’s remind ourselves of this when there are pairs of brackets, which will often result in a quadratic equation. Don’t forget to simplify the resulting equation by collecting like terms.

Let’s try a few first with the teacher.

Exercise

Let’s complete questions 2,3, 5 and 7 from exercise 19B from page 310 of the textbook:

The answers are below: