Split the middle term: 72 + b - b^2

Answer:b (1-b)

Step-by-step explanation:

b-b^2

factorize the common terms

b

b (1-b)

Answer: 9b - 8b

Step-by-step explanation:

ou need two factors that you will multiply together to give you - 72b^2 and at the same time when you add this two factors it will give you + b. Check; 9b X - 8b = - 72b^2 and 9b + (-8b) = b, that is why 9b and - 8b are the factors and they will replace the middle value