Question

Resolva a inequação 2x² + x - 15 < 0:

Answer 1

$2 x^{2} +x-15\ \textless \ 0 \\ 2 x^{2} +6x-5x-15\ \textless \ 0 \\ (2x-5)*(x+3)\ \textless \ 0 \\ \left \{ {{2x-5\ \textless \ 0} \atop {x+3\ \textgreater \ 0}} \right. \\ \left \{ {{2x-5\ \textgreater \ 0} \atop {x+3\ \textgreater \ 0}} \right. \\ \left \{ {{x\ \textless \ 5/2} \atop {x\ \textgreater \ -3}} \right. \\ x=[-3,5/2]$