Solve the given quadratic inequalities. Check each by displaying the solution on a calculator.

|x² + 3x − 1| < 3 (See Exercise 31.)

Data from Exercises 31

|x² + x − 4| < 2

[Use Eq. (17.2), and then treat the resulting inequality as two inequalities of the form f (x) > −n and f (x) < n. The solution includes the values of x that satisfy both of the inequalities.]