10. x^2<-3x+18. The solution of this inequality consists one or more of the following intervals: (-inf, A), (A, B), and (B), inf where A<B. Find A and B.
11.x^4>25x^2 Solve the inequality and write the answer in interval notation.
12. (x+20)/(x^2-1) Find the domain of the function and write in...