Four times the sum of twice a number and -3 is less than times that same number

Airline passengers arrive randomly and independently at the passenger-screening facility at a major international airport. the mean arrival rate is 10 passengers per minutes. compute the following probabilities. p(x = 4) p(x > 11)

Which of the binomials below is a factor of this trinominal? x^2-13+30

Asap! i'm not good math and i'm lost.