POLYNOMIAL FUNCTIONS Determine whether each identity is true or false.
1. a2−b2=(a+b)(a+b)
2. a2−2ab+b2=(a+b)(a−b)
3. a2+2ab+b2=(a+b)(a+b)
4. a3−b3=(a−b)(a2+ab+b)

the revenue of the fitness center, y, is the product of two factors: the number of members and the fee paid by each member. there are 320 members now, but number of members goes down by 10 for each $5 increase in fees, so if x is the number of $5 price increases then members is equal to (320 - 10x). since the fee is currently $45, and the fee increases by $5 for every price bump x, the fee is given by (45 + 5x). so, revenue y is given by y = (320 - 10x)(45 + 5x).