Question

Решите неравенство: х^2+2х-15/х^2+1<0

Answer 1

$frac{x^2+2x-15}{x^2+1} textless 0\\x^2+2x-15=0; ; to ; ; x_1=-5,; x_2=3; ; (teorema; Vieta)\\frac{(x+5)(x-3)}{x^2+1} textless 0; ,; ; x^2+1 textgreater 0\\+++(-5)---(3)+++\\underline {xin (-5,3)}$