Question

7a³-6a²+ 5a-4 from -9a³+4a²-4a+6

Answer 1

If we have to subtract then refer to the attachment


Otherwise if we have to add
then

-9a³ + 4a² - 4a + 6 + 7a³ - 6a² + 5a - 4

( we have to solve like term )

- 2a³ - 2a² + a + 2