Question

решите пожалуйста: 24abm+42cdm-16abn²-28cdn²

Answer 1

$2(12abm + 21cdm - 8abn {}^{2} - 14cdn {}^{2} ) \\ 2(3m(4a + 7cd) - 2n {}^{2} \times (4ab + 7cd)) \\ 2(4ab + 7cd)(3m - 2n {}^{2} )$