Imagine you are minding your own business, solving some equations at school or work. You start with , and pretty quickly realise this this equation is true if or if . What about Well, for this equation the only possibility is .
You move on to Now hang on a minute... here things get a little weird. Taking the square root of a negative number is not allowed... Or is it?
It turns out that with a little imagination and mathematical bravery you can break the rules and find yourself in a whole new mathematical landscape: the complex numbers. This package gives you a brief introduction to this new world, and explores the impact it has on our everyday lives and people who use complex numbers in their work everyday.
If you are looking for teaching and learning resources involving complex numbers, you might also want to have a look at the package Adventures with complex numbers, which we developed in collaboration with our sister site NRICH. And for more articles on complex number on Plus, see our teacher package.