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x2-7x+10=0 suma radacinilor . multumesc :)

Răspuns :

[tex]ax^2+bx+c=0\\ \\\textbf{Relatiile lui Vi\'ete:}[/tex]

[tex] x_1+x_2 = -\dfrac{b}{a}\\ x_1\cdot x_2 = \dfrac{c}{a}\\ \\ \\\text{Deci:}[/tex]

[tex]x^2-7x+10 = 0\\\\ \Rightarrow x_1+x_2 = -\dfrac{-7}{1} = \boxed{7}[/tex]