Odpowiedź:
[tex]5x^{2} +10x > 0\\\\5x*(x+2) > 0\\\\\left \{ {{x > 0} \atop {x+2 > 0}} \right. \\\\\left \{ {{x < 0} \atop {x+2 < 0}} \right. \\\\\left \{ {{x > 0} \atop {x < -2}} \right. \\\\\left \{ {{x < 0} \atop {x < -2}} \right. \\\\\\x= \{ \infty},-2 \}\\x=\{0, + \infty\}[/tex]
