Função Quadrática
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[tex]\boxed{\begin{array}{lr} \\ \large \sf \: \Delta = {b}^{2} - 4ac \\ \\ \large \sf \Delta = { ( - 2)}^{2} - 4 \cdot1 \cdot - 8 \\ \\ \large \sf \Delta = 4 + 32 \\ \\ \red{\large \sf \Delta = 36} \\ \: \end{array}}[/tex]
[tex] \boxed{ \large \sf \: x_{1} = \dfrac{2 + 6 }{2} = \boxed{ \red{ \large \sf 4}}}[/tex]
[tex] \boxed{ \large \sf \: x_{2} = \dfrac{2 - 6 }{2} = \boxed{ \red{ \large \sf - 2}}}[/tex]
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Para Cima ⬆️, Pois A > 0
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[tex] \large \sf \boxed{ \large \sf \: x_{v} = \dfrac{ - b}{2.a} = \dfrac{ - ( - 2)}{2} = \red{1}} \\ \\ \\ \large \sf \boxed{ \large \sf y_{v} = \frac{ - \Delta}{4.a} = \frac{ - ( + 36)}{4} = \red{-9}}[/tex]
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Gráfico Acima ⬆️⬆️
