Respuesta :

[tex]7x^{2} - 31x - 20[/tex]
[tex]7 x^{2} - 35x + 4x - 20[/tex]
[tex](7x^2 - 35x)(4x-20)[/tex]
[tex]7x(x - 5)[/tex]   [tex]4(x-5)[/tex]

Final answer: [tex](7x+4)(x-5)[/tex]

Hope this helps! :)
(x - 5)*(7x+4) ( i got the answer from photomath )