Math
posted by Ms.Ellis .
9. Essay; show all work. Bob’s Barber Shop estimates their gross revenue for the second quarter to be given by the polynomial 2x3 + 5x2 – x – 1. The shop estimates their costs for that quarter to be given by 4x2 – 9x – 8. For the second quarter, find and simplify a polynomial that will represent their profit.

in general ...
profit = revenue  cost
= 2x^3 + 5x^2  x  1  (4x^2  9x  8)
= 2x^3 + x^2 + 8x +7