Question

Решите неравенство: (2x – 5)(2x + 5) – ( 2x + 3)2 ≤ 2

Answer 1

 (2x – 5)(2x + 5) – ( 2x + 3)2 ≤ 2

4x^2-25-4x^2-12x-9≤2

-12x ≤ 2+25+9

-12x<=36</span>

x>=-3

xe[3, +oo)