The Pear company sells pPhones. The cost to manufacture 2 pPhones is
C(x) = 23x² + 45000x + 21087 dollars (this includes overhead costs and production costs for each Phone).
If the company sells pPhones for the maximum price they can fetch, the revenue function will
be R(x)= -32x² +261000 dollars.

How many pPhones should the Pear company produce and sell to maximimze profit?

(Remember that profit=revenue-cost.)
X=