Definition of quadratic equation
: any equation containing one term in which the unknown is squared and no term in which it is raised to a higher power
solve for x in the quadratic equation x^{2} + 4x + 4 = 0
Test Your Vocabulary
Challenging Words You Should Know

 Often used to describe “the march of time,” what does inexorable mean?
Test your visual vocabulary with our 10question challenge!
TAKE THE QUIZA daily challenge for crossword fanatics.
TAKE THE QUIZLove words? Need even more definitions?
MerriamWebster unabridged
Share quadratic equation
Time Traveler for quadratic equation
The first known use of quadratic equation was in 1647
See more words from the same year