Question

чему равна сумма корней уравнения

Answer 1

$(2x-5)^{2}=25\\\\\left[\begin{array}{ccc}2x-5=5\\2x-5=-5\end{array}\right\\\\\\\left[\begin{array}{ccc}2x=10\\2x=0\end{array}\right\\\\\\\left[\begin{array}{ccc}x_{1}=5 \\x_{2}=0 \end{array}\right\\\\\boxed{x_{1}+x_{2}=5+0=5}$