MARCELLRIBEIROCASTROON MARCELLRIBEIROCASTROON Matemática Respondido (12x2).(3x) = b) (-5xyz). (-xy) = c) (7a) . (2b) . (- 2ab) = d) (- 9x2y) . (-2xy2) . (2z) = e) (x/5) . (3x) = f) (4x/5). (y/3) = g) ( 4x3)2 =