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 + 2x - 9 C (x) = 7x^2 + 5x - 5 The monthly profit can be found by subtracting cost from revenue: p (x) = R (x) - C (x) Use these equations to find the number of systems to install in order to break-even. (profit equals 0)