Question

решите неравенства (x+1)(x-1)/x+4<0

Answer 1

$frac{(x+1)(x-1)}{x+4}<0\\x+1=0; ,; x-1=0; ,; x+4=0; ; Rightarrow ; ; x_1=-1; ,; x_2=1; ,; x_3=-4\\znaki:; ; ; ; ---(-4)+++(-1)---(1)+++\\xin (-infty ,-4)cup (-1,1)$