Question

помогите с заданием срочно 15 баллов даю

Answer 1

½ab²+7/12bab-¾b²а+b(5/6)ab=
=(½-¾)аb²+(7/12+5/6)ab²=¼ab²+(17/12)a²b

$16 {x}^{5} {y}^{4} zxx {z}^{4} + 14xyz^{4}xx^{5}y^{2}zy - \\ - 7x^{7}yz^{2}yz^{2}yyz = \\ = 16x^{7}y^{4}z^{5} + 14x^{7}y^{4}z^{5} - 7x^{7}y^{4}z^{5} = \\ = (16 + 14 - 7)x^{7}y^{4}z^{5} = \\ = 23x^{7}y^{4}z^{5}$