Posted by joe hahira on Monday, March 7, 2011 at 12:00pm.
Essay; show all work. Bob’s Barber Shop estimates their gross revenue for the second quarter to be given by the polynomial 7x3 – 9x2 – 2x + 4. The shop estimates their costs for that quarter to be given by x2 + 7x – 5. For the second quarter, find and simplify a polynomial that will represent their profit.

algebra  Henry, Monday, March 7, 2011 at 10:36pm
P=(7X^3  9X^2  2X + 4)(X^2 + 7X 5).
P=7X^3  9X^2  2X + 4  X^2  7X + 5,
Combine liketerms:
P = 7X^3  10X^2  9X + 9,

algebra  Henry, Monday, March 7, 2011 at 10:39pm
P=(7X^3  9X^2  2X + 4)(X^2 + 7X 5).
P=7X^3  9X^2  2X + 4  X^2  7X + 5,
Combine liketerms:
P = 7X^3  10X^2  9X + 9,
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