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Quadratic equations. Vieta's formulas


The solutions [tex]x_1[/tex] and [tex]x_2[/tex]  of the quadratic equation [tex]ax^2+bx+c=0[/tex] can be found by special Vieta’s formulas: $$x_1 + x_2 = -\frac{b}{a}, \ \ x_1 \cdot  x_2 = \frac{c}{a}$$

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