Answer:
The difference is 14.
Step-by-step explanation:
We are to subtract 3x² + 4x - 5 from 7x² + x + 9.
⇒ 7x² + x + 9 - (3x² + 4x - 5)
= 7x² + x + 9 - 3x² - 4x + 5
= (7 - 3)x² + (1 - 4)x + 9 + 5
= 4x² - 3x + 14
Now we subract 4x² - 3x from the above polynomial.
⇒ 4x² - 3x + 14 - (4x² - 3x)
= 4x² - 3x + 14 - 4x² + 3x
= (4 - 4)x² + (3 - 3)x + 14
= 14 which is the required difference.
