По теореме Виета:
[tex]{x}^{2}+ bx + c = 0 \\ x_{1}+x_{2} =- b\\ x_{1}x_{2}=c[/tex]
[tex] {x}^{2} - 5x - 14 = 0 \\ x_{1}+x_{2}= - ( - 5) = 5\\ x_{1}x_{2} = - 14[/tex]
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По теореме Виета:
[tex]{x}^{2}+ bx + c = 0 \\ x_{1}+x_{2} =- b\\ x_{1}x_{2}=c[/tex]
[tex] {x}^{2} - 5x - 14 = 0 \\ x_{1}+x_{2}= - ( - 5) = 5\\ x_{1}x_{2} = - 14[/tex]