Imagine This!

Imagine this!

It's amazing what you can do when you go beyond the Real world...

Vanishing Roots

Age 14 to 18
If $y=x^2-6x+c$, and we vary $c$, what happens to the roots when $c>9$?

Opening the Door

Age 14 to 18Challenge Level
What happens when we add together two complex numbers?

Strolling Along

Age 14 to 18Challenge Level
What happens when we multiply a complex number by a real or an imaginary number?