Question

qual a forma fatorada de xy + 6y + 7x +28

Answer 1

Olá,

$xy + 6y + 7x + 28$

$y(x + 6) + 7x + 28$

$y(x + 6) + 7(x + 4)$

$y(x + 4 + 2) + 7(x + 4)$

$y((x + 4) + 2) + 7(x + 4)$

$y(x + 4) + 2y + 7(x + 4)$

$(y + 7)(x + 4) + 2y$