21x^3 + 6x^2 - 28x - 8 factor this expression with work ?

What is the length of the segment, endpoints of which are intersections of parabolas y=x^2− 11/4 x− 7/4 and y=− 7 /8 x^2+x+ 31/8 ?

Question 5 of 10 2 points if a population is a sample of the population could be a. registered voters; all citizens o o b. baptists; all religious people o c. people who purchased shoes; all customers o d. the entire school faculty; math teachers

Use the quadratic function to predict f(x) if x equals 8. f(x) = 25x2 − 28x + 585