X(x+1)<2(1-2x-x²) помогите прошу

Question

X(x+1)<2(1-2x-x²) помогите прошу

Answer 1

+x<2-4x-2<img src="https://tex.z-dn.net/?f=+x%5E%7B2%7D+" id="TexFormula2" title=" x^{2} " alt=" x^{2} " align="absmiddle" class="latex-formula">
3+5x-2<0<br>d=25+24=49   ( -5+-7)/6=   -2    1/3
х=(-2;1/3)