Respuesta :

[tex]\begin{gathered} \text{ Given that } \\ 6x^2-x-40=0 \end{gathered}[/tex][tex]\begin{gathered} \text{ Therefore} \\ 6x^2-16x+15x-40=0 \\ \text{Hence,} \\ 2x(3x-8)+5(3x-8)=0 \\ \text{Thus} \\ (2x+5)(3x-8)=0 \\ \text{ therefore} \\ 2x+5=0;3x-8=0 \\ \text{this implies that} \\ x=\frac{8}{3};x=-\frac{5}{2} \end{gathered}[/tex]