Saini Sprinkler Company installs irrigation systems. To track monthly costs C and revenues R, they use the following functions, where x is the number of systems they install. R(x)=8x^2+12x+4

C(x)=7x^2+20x-12

The monthly profit can be found by subtracting cost from revenue.

P(x)=R(x)-C(x)

Find a function to project monthly profit and then use it to find the break-even point where the profit is zero.