Question 400584
If profit = revenue - costs, then
{{{P = 2x^3 + 5x^2 - x - 1 - (4x^2 - 9x  - 8)}}}
{{{P = 2x^3 + 5x^2 - x - 1 - 4x^2 + 9x + 8}}}
{{{P = 2x^3 + x^2 + 8x + 7}}}