Andengradspolynomium: Forskelle mellem versioner
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Linje 31:
:<math>D = b^2 - 4ac\,\!</math>
Ligningen vil så have rødder, eller
:<math> ax^2 + bx + c = 0 \quad \Leftrightarrow \quad x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a} = \frac{-b \pm \sqrt{D}}{2a}</math>
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