Ответ Автор - m11m (2x-7)(2x+7)≥6x-514x²-49-6x+51≥04x²-6x+2≥02x²-3x+1≥02x²-3x+1=0D=9-8=1x₁=3-1= 2/4 =1/2 4x₂ =3+1 =1 4 + - +----------- 1/2 ----------- 1------------\\\\\ \\\\\\x∈(-∞; 1/2]U[1; +∞)