Question

Сумма корней уравнения 1/x^2-3/x-4=0

Answer 1

$frac{1}{x^2}-frac{3}{x}-4=frac{-4x^2-3x+1}{x^2}=frac{4x^2+3x-1}{x^2}=0$

$4x^2+3x-1=0$

$x=-1; x=frac{1}{4}; 1/4-1=-3/4$