[tex]\displaystyle\bf\\Teorema Vieta :\\\\x^{2} +px+q=0\\\\x_{1} + x_{2} =-p\\\\x_{1} \cdot x_{2} =q\\\\\\x^{2} -4x-7=0\\\\x_{1} \cdot x_{2} =-7[/tex]
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[tex]\displaystyle\bf\\Teorema Vieta :\\\\x^{2} +px+q=0\\\\x_{1} + x_{2} =-p\\\\x_{1} \cdot x_{2} =q\\\\\\x^{2} -4x-7=0\\\\x_{1} \cdot x_{2} =-7[/tex]