Respuesta :

Answer:

[tex]x^2-x-12[/tex]

Step-by-step explanation:

[tex](x+3)(x-4)\\\\=x(x-4)+3(x-4)\\\\=x^2-4x+3x-12\\\\=x^2-x-12[/tex]

(x^2 - x - 12)

hope that helps
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