Question

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

Answer 1

$ax^2+bx+c=0\\ \\\textbf{Relatiile lui Vi\'ete:}$

$x_1+x_2 = -\dfrac{b}{a}\\ x_1\cdot x_2 = \dfrac{c}{a}\\ \\ \\\text{Deci:}$

$x^2-7x+10 = 0\\\\ \Rightarrow x_1+x_2 = -\dfrac{-7}{1} = \boxed{7}$