Answer:
0
Step-by-step explanation:
Answer:
the difference is 14
Step-by-step explanation:
subtracting 3x2 4x – 5 from 7x2 x 9 results in a polynomial
Subtract 

Multiply negative inside the parenthesis


Now we subtract 4x^2 -3x from the result 


14
The answer is b! Hope this helped