Quadratic Equation

  • #1
Hi All,

I have a semantics question.

Why is the quadratic equation called what it is?

A polynomial of degree two is called a quadratic polymonial but I've always associated the root quad to mean four!!

Thanks in advance.

Bob:smile:
 

Answers and Replies

  • #2
44
0
From wikipedia, "Quadratic equations are called quadratic because quadratus is Latin for "square"; in the leading term the variable is squared."

I always wondered that as well to be honest.
 
  • #3
arildno
Science Advisor
Homework Helper
Gold Member
Dearly Missed
9,970
132
Well, what do you call a rectangle whose length is x and breadth is x, and whose area is x^2?

Not a..square?
 
  • #4
HallsofIvy
Science Advisor
Homework Helper
41,833
961
If you get exercised over this sort of thing (I know I do!), you might find this website to be of interest:
http://pballew.net/etyindex.html

It notes that "quadratic" is from the Latin for "to make square" or, as Lamoid said, simple "square". Of course, a square has four sides which is where your use of the word is from.
 

Related Threads on Quadratic Equation

  • Last Post
Replies
2
Views
2K
  • Last Post
Replies
5
Views
2K
  • Last Post
Replies
10
Views
3K
  • Last Post
Replies
9
Views
5K
  • Last Post
Replies
3
Views
1K
  • Last Post
Replies
1
Views
2K
  • Last Post
Replies
2
Views
3K
  • Last Post
Replies
2
Views
2K
  • Last Post
Replies
5
Views
3K
  • Last Post
2
Replies
27
Views
5K
Top