Section 1.7 Inequalities
... Note that (x + 3)2 is either positive or zero. Therefore, the only solution of the inequality (x + 2)(x + 4) ≤ −1 is x = −3. In a similar way one can show that the solution of the inequality (x + 2)(x + 4) ≥ −1 is all real numbers. ...
... Note that (x + 3)2 is either positive or zero. Therefore, the only solution of the inequality (x + 2)(x + 4) ≤ −1 is x = −3. In a similar way one can show that the solution of the inequality (x + 2)(x + 4) ≥ −1 is all real numbers. ...
