What are the characteristics of x^2-x+1

In the figure dhg fhe which statement is true by cpctc

How do you use the elimination method for this question? explain, because i really want to understand!

The human resources manager at a company records the length, in hours, of one shift at work, x. he creates the probability distribution below. what is the probability that a worker chosen at random works at least 8 hours? probability distribution px(x) 6 hours 7 hours 8 hours 9 hours 10 hours 0.62 0.78 пол