Meaning of “quadratic equation” in the English Dictionary

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"quadratic equation" in British English

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(Definition of “quadratic equation” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"quadratic equation" in American English

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quadratic equationnoun [ C ]

/kwɑˈdræt̬·ɪk ɪˈkweɪ·ʒən/

algebra an equation (= mathematical statement) that includes an unknown value multiplied by itself only once, and does not include an unknown value multiplied by itself more than once; an equation that can be expressed as ax²+bx+c=0, when a does not equal zero

(Definition of “quadratic equation” from the Cambridge Academic Content Dictionary © Cambridge University Press)