Question

найдите корни уравнения х+2/х==51/7

Answer 1

$x+ frac{2}{x} =- frac{51}{7} \ frac{ x^{2} +2}{x} =- frac{51}{7} \ 7 x^{2} +14=-51x \ 7 x^{2} +51x+14=0 \ D=2601-392=2209=47^{2} textgreater 0 \ x_{1,2} = frac{-51+-47}{14} \ x1=- frac{4}{14} = - frac{2}{7} \ x2= -7$