Question

Решить неравенство
X^2-2|X+1|<0

Answer 1

$x^2-2|x+1|<0\\x^2-2(x+1)<0, ~~x+1\geq0\\x^2-2(-(x+1))<0, ~~x+1<0$

x ∈ $(1 - \sqrt{3}, 1 + \sqrt{3})$