# Quadratic Inequalities Exercises

### Example 1

Solve the inequality (3*x* + 1)(*x* – 1)(2*x* + 3) ≤ 0.

### Example 2

Solve the inequality *x*^{2} + 3 > 4*x*.

### Example 3

Solve the inequality (*x* + 4)^{2}(*x* – 4) ≥ 0.

### Example 4

Solve the inequality *x*^{2} + 7*x* + 4 < 0.