Question

Допоможіть !!!!!!!!!!!!!!!!!!!!!!!

Answer 1

Ответ:

$1)4 {x}^{3} + 2 {x}^{2} - 9 + 6 {x}^{3} + 5 {x}^{2} - 4 = 10 {x}^{3} + 7 {x}^{2} - 13$

$2)4 {x}^{3} + 2 {x}^{2} - 9 - (6 {x}^{3} + 5 {x}^{2} - 4) = 4 {x}^{3} + 2 {x}^{2} - 9 - 6 {x}^{3} - 5 {x}^{2} + 4 = - 2 {x}^{3} - 3 {x}^{2} - 5$