Question

plz tell me this question​

Answer 1

Step-by-step explanation:

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

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

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

$= 17 {x}^{3} - 11 {x}^{2} -11$