(1)
4x²-27x+18>0
(4x-3)(x-6)>0
x<3/4或x>6
x²+4x+4>0
(x+2)²>0
x≠2
∴
x<3/4或x>6
(2)3x²+x-2≥0
(3x-2)(x+1)≥0
x≤-1或x≥2/3
4x²-15x+9>0
(4x-3)(x-3)>0
x<3/4或x>3
x≤-1或2/3≤x<3/4或x>3
(1)
4x²-27x+18>0
(4x-3)(x-6)>0
x<3/4或x>6
x²+4x+4>0
(x+2)²>0
x≠2
∴
x<3/4或x>6
(2)3x²+x-2≥0
(3x-2)(x+1)≥0
x≤-1或x≥2/3
4x²-15x+9>0
(4x-3)(x-3)>0
x<3/4或x>3
x≤-1或2/3≤x<3/4或x>3