Question

(a³- 3ax + 5x²) + ( -7x² + ax + 2a³)​

Answer 1

$= a³- 3ax + 5x²) + \\ ( -7x² + ax + 2a³)$

$= a³- 3ax + 5x² -7x² \\ + ax + 2a³$

$= {a}^{3} + 2 {a}^{3} - 3ax + ax \\ + 5 {x}^{2} - 7 {x}^{2}$

$=3 {a}^{3} - 2ax - 2 {x}^{2}$

Answer 2

$\sf = (a³- 3ax + 5x²) + ( -7x² + ax + 2a³)$

$\sf = {a}^{3} - 3ax + {5x}^{2} - {7x}^{2} + ax + {2a}^{3}$

$\sf = a³ +2a³ - 3ax + ax + {5x}^{2} - {7x}^{2}$

$\sf = {3a}^{3 } - 2ax - {2x}^{2}$