1.a (x + 4)(2x – 1)²(x - 3) ≤ 0
(x + 4)(2x - 1)(2x -1)(x - 3) ≤ 0
x + 4 ≤ 0 atau 2x – 1 ≤ 0 atau x – 3 ≤ 0
x + 4 – 4 ≤ 0 – 4 2x – 1 + 1 ≤ 0 + 1 x – 3 + 3 ≤ 0 + 3
x ≤ -4 2x ≤ 1 x ≤ 3
x ≤ 
Hp {
|
, x 
| , x 1.b ( 
- 
≤ 0 × 
- ≤ 0 × 
≤ 0
( ) ≤ 0( ) 2x – x + 1 ≤ 0
x – 1 ≤ 0
x – 1 + 1 ≤ 0 + 1
x ≤ 1
Hp {|
, x
| , x 2.a 
→ 2 + 
> 7 atau 2 + < -7
→ 2 + > 7 atau 2 + < -7(2 + ) > 7() (2 + 
)<-7 () 2
> 7 2 + 5 < -7
> 7 2 + 5 < -7 2
> 7 2
< -7
> 7 2 < -7 -5
> 0 9 < 0
> 0 9 < 0 -5
> 0 – 5 9 < 0 – 5
> 0 – 5 9 < 0 – 5 -1(-5
>( -5)-1 9 < -5
>( -5)-1 9 < -5 5 < 5 < 
< 5 < < 
< 1Hp {|
< , x
| < , x 2.b 2|2 – 3|< | + 10|→ 2 ( 2- 3 )² < (+ 10)²
– 3|< | + 10|→ 2 ( 2- 3 )² < (+ 10)² (4-6)² < 
+ 20+100
-6)² < + 20+100 16- 48+36 <
+ 20+100
- 48+36 <+ 20+100 16- -48+36 < -+ 20+100
- -48+36 < -+ 20+100 15-48-20+36 < 20-
20+100
-48-20+36 < 20-20+100 15-68+36-100 < 100-100
-68+36-100 < 100-100 15- 68- 64 < 0
- 68- 64 < 0 (15 - 80)( 15 + 12) < 0
- 80)( 15 + 12) < 0 15 - 80 < 0 atau 15 + 12 < 0
- 80 < 0 atau 15 + 12 < 0 15 – 80 + 80 < 80 15 + 12 – 12 < -12
– 80 + 80 < 80 15 + 12 – 12 < -12 15 < 80 15 < -12
< 80 15 < -12 < 
< 
< 5.3 < -0.8Hp {|
< -0.8 , x
| < -0.8 , x 3. Persamaan garis yang melalui (0,-4) tegak lurus pada garis 
+ 2 = -( - 1)
+ 2 = -( - 1)
- 
= m₁ ( - ₁)m₁ = -
m₂ = 
m₂ = 2
m₂ = 2 - 
= m₂( - ₂) – (-4) = 2 ( - 0) + 4 = 2 + 4 - 4 = 2
– 4 = 2 – 44. + 
= 36
+ = 36
= 
+ = 6
= 6 - | | f( )= 6 - | ( , ) |
-3 | 6 - (-3) = 9 | -3,9 |
-2 | 6 - (-2) = 8 | -2,8 |
-1 | 6 - (-1) = 7 | -1,7 |
0 | 6 - 0 = 6 | 0,6 |
1 | 6 - 1 = 5 | 1,5 |
2 | 6 - 2 = 4 | 2,4 |
3 | 6 - 3 = 3 | 3,3 |
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