Respuesta :

loneguy

[tex]4x^2-19x+21\\\\=4x^2-7x-12x+21\\\\=x(4x-7)-3(4x-7)\\\\=(x-3)(4x-7)[/tex]

ulakshansubes

Answer:

(4x-7) (x-3)

Step-by-step explanation:

[tex]4x {2} - 19x + 21 \\ = 4x {2} - 7x - 12x + 21 \\ = x(4x - 7) - 3(4x - 7) \\ = (4x - 7)(x - 3)[/tex]