3.8K views · 90 reactions | In algebra, a quadratic equation (from the Latin quadratus for "square") is any equation that can be rearranged in standard form as a x 2 + b x + c = 0 {\displaystyle ax^{2}+bx+c=0} ax^{2}+bx+c=0 where x represents an unknown, and a, b, and c represent known numbers, where a ≠ 0. If a = 0, then the equation is linear, not quadratic, as there is no a x 2 {\displaystyle ax^{2}} ax^2 term. | Mathematics | Facebook

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Quantifiers in Mathematical Logic | Definition & Examples