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quadratic form

noun, Mathematics.
1.
a polynomial all of whose terms are of degree 2 in two or more variables, as 5 x 2 − 2 xy + 3 y 2 .
Origin of quadratic form
1855-1860
First recorded in 1855-60
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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