Changing The Subject - In A Minute: Book 17 of the In A Minute Series

This is sometimes called ‘Rearranging Formulae’ in schools. I don’t call it that because it’s a title that is not all-encompassing. In other words, if you learn to change the subject, you can do it with anything, it doesn’t particularly have to be a formula. In fact we’ll see that we’ve come across this concept already in the Three Types of Algebra.

In this book we’re going to examine changing the subject from simple equations to more complicated expressions. To do this we’ll see how we can use BIDMAS - you’ll see that this can be used in an unexpected way!

After that we’ll look at how solving our 3 types of algebra is essentially changing the subject. We will then look at complicated situations where it’s not clear what our first step should be.

Finally, we’ll look at some famous formulae in science and re-arrange them.