Skip to content
One Long Tail
Lessons
Hands-on
Plans
About us
Menu
Lessons
all 428, by branch
Hands-on
lessons you can touch
Plans
what we're building
About us
who we are, contact
All mathematics lessons
Mathematics
Lesson 30 of 85
Bombelli and imaginary numbers
Is the square root of a negative number any use?
c. 2000 BC
today
Era 3 of 6:
Symbol and space
, 1500 – 1680
Check yourself
Loading exercises…