a) <=> \(\frac{3x+1}{2}-\frac{x-2}{3}-\frac{1-2x}{4}<0\)
<=> \(12\left(\frac{3x+1}{2}-\frac{x-2}{3}-\frac{1-2x}{4}\right)<0\)
<=> 6(3x + 1) - 4(x - 2) - 3(1 - 2x) < 0
<=> 20x + 11 < 0
<=> 20x < - 11
<=> x < \(-\frac{11}{20}\)
b) <=> 2x2 + 5x – 3 – 3x + 1 ≤ x2 + 2x – 3 + x2 - 5
<=> 0x ≤ -6.
Vô nghiệm.