“What do you feed a baby parabola?”/“Quadratic formula.”

A math pun on the word “formula” has been printed on several images:
 
Q: What do you feed a baby parabola?
A: Quadratic formula.
   
“What does a baby parabola drink? Quadratic Formula” was posted on Twitter on February 16, 2013.
   
“What do baby mathematicians drink?”/“Formula” is a later form of this riddle.
   
     
Wikipedia: Quadratic formula
In elementary algebra, the quadratic formula is the solution of the quadratic equation. There are other ways to solve the quadratic equation instead of using the quadratic formula, such as factoring, completing the square, or graphing. Using the quadratic formula is often the most convenient way.
(...)
Each of the solutions given by the quadratic formula is called a root of the quadratic equation. Geometrically, these roots represent the x values at which any parabola, explicitly given as y = ax2 + bx + c, crosses the x-axis.
 
Twitter
Matt Simpson
‏@PhatSimpson
What does a baby parabola drink? Quadratic Formula
12:49 AM - 16 Feb 2013
 
Twitter
Ron Wittler
‏@rwittler
what does a baby parabola have in its bottle?  Quadratic formula
12:34 PM - 11 Dec 2013
 
Twitter
Kaitlyn
‏@kaitlyndips
WHAT DO BABY PARABOLAS DRINK???
QUADRATIC FORMULA
7:45 AM - 30 May 2014
 
Twitter
case
‏@ctabayoyong
What did the mother parabola feed the baby parabola
2:11 PM - 13 Nov 2014 from San Jose, CA
 
Reddit—Jokes
What do baby parabola drink?
submitted February 19, 2016 by Elasaire
Their Quadratic Formula!
 
Twitter
Ya Bish
‏@AdamGyabish
“What do you feed a baby parabola?”
Quadratic Formula 😐😐😐🔫
3:08 PM - 21 Apr 2016 from San Marcos, CA
 
Twitter
Jade ミドリ
‏@otaku_relly
What do you feed a baby parabola?
A quadratic formula 🍼
-math joke
6:49 AM - 22 Aug 2016
 
Reddit—Jokes
What do you feed a baby parabola?
submitted February 14, 2017 by Trexence
Quadratic formula