(5x-2)/3 - (3-x)/2 > 1
10x-4 - 9 + 3x > 6
13x > 19
x > 19/3
2)
x² - 3,2x < 0
x(x-3,2)<0<br>0 < x < 3,2
3)
x ≤ -2 U 1 ≤ x ≤ 3 U x ≥ 4
4)
x⁴ - 3x² + 2 ≥ 0
D = 9 - 8 = 1
x²(1) = (3-1)/2 = 1
x²(2) = (3+1)/2 = 2
x² ≤ 1 U x² ≥ 2
-1 ≤ x ≤ 1 U x < -√2 U x > √2