Answer:
Your teacher is right.
Step-by-step explanation:
If you remember the Pemdas rule, you know you need to eliminate the brackets first by using distributive property of multiplication.
(-4b - 3) 4b - 5b
(-4b × 4b) - (3 × 4b) - 5b
- 16b^2 - 12b - 5b
- 16b^2 -17b
