Giải bất phương trình :

1) (x^3-2x)(-1/2x^2 +x+1) >0

2) (x^2+x+1)^2 < (x+2)^2

3) x^4 -5x^2 +6x-5>0

1, √x^2-5x+8<=3x-10

2, x^2-4x+3/3-2x<1-x

3, |x^2+x-2|+3x^2-3>0

4, |x+3|>=2(1+x^2)

5, |x^2-1|>x^2+2x-3

6, |2x-1|<x+2

7, 3/2-x<=1

8, 2+3x-x^2<=√4+3x-x^2

9, √x^2-5x+6<5-x

10, x^2-6>5(x+√x^2-5x)

11, |x^2-x|<=x^2-x

1, √x^2-5x+8<=3x-10

2, x^2-4x+3/3-2x<1-x

3, |x^2+x-2|+3x^2-3>0

4, |x+3|>=2(1+x^2)

5, |x^2-1|>x^2+2x-3

6, |2x-1|<x+2

7, 3/2-x<=1

8, 2+3x-x^2<=√4+3x-x^2

9, √x^2-5x+6<5-x

10, x^2-6>5(x+√x^2-5x)

11, |x^2-x|<=x^2-x

1, √x^2-5x+8<=3x-10

2, x^2-4x+3/3-2x<1-x

3, |x^2+x-2|+3x^2-3>0

4, |x+3|>=2(1+x^2)

5, |x^2-1|>x^2+2x-3

6, |2x-1|<x+2

7, 3/2-x<=1

8, 2+3x-x^2<=√4+3x-x^2

9, √x^2-5x+6<5-x

10, x^2-6>5(x+√x^2-5x)

11, |x^2-x|<=x^2-x

a, (2x-5)(x+2)/-4x+3>0
b, x-3/x+1>x+5/x-2
c, 3x-4/x-2>1
d, 2x^2+x/1-2x≥1-x
e, -3x^2-x+4/x^2+3x+5>0
f, 5x^2+3x-8/x^2-7x+6<0

1, √x^2-5x+8<=3x-10

2, x^2-4x+3/3-2x<1-x

3, |x^2+x-2|+3x^2-3>0

4, |x+3|>=2(1+x^2)

5, |x^2-1|>x^2+2x-3

6, |2x-1|<x+2

7, 3/2-x<=1

8, 2+3x-x^2<=√4+3x-x^2

9, √x^2-5x+6<5-x

10, x^2-6>5(x+√x^2-5x)

11, |x^2-x|<=x^2-x

 Giải bất phương trình bậc hai :

Loại 1) Khi phương trình bậc hai có 2 nghiệm phân biệt:

        a) 2x^2+x-3>0

b x^2+3x-1>0   c) 4x^2-1<'or'=0  d)x^2+5x+6>'or'=0 

e) x^2+3x+2<'or'=0    f)x^2+4x+3<0

1. Giai BPT:

a, 5x²-3x-2≤0

b,(-8x²+x+9).(2x+3)>0