Algebra Demystified 2nd Ed

338 algebra De mystif ieD

3. yxy
   x

x

=- ≤≤

≤- ≤

-- -

-≤-≤

• 
  


• 
  

≥-

• 
  

72 410

47210

77 7

323

3

2

2

2

xx

xx

≥

• ≥≥--≤≤

3

2

3

2

3

2

3

2

3

2

or

4. yx y
   x

x

=+-≤ ≤-

-≤ +≤-

---

-≤ ≤-

• ≤

8151

5811

111

68 2

6

8

8

88

2

8

3

4

1

4

x

x

≤-

• ≤≤-

5. yx y

x

x

=- <<

<-<

+++

<<

⋅<⋅

2

3

84 6

4 2

3

86

888

12 2

3

14

3

2

12

1

3

2

22

3

3

2

14

1

18 21

x

x

<⋅

<<

6. y x y

x

x

x

= - -≤ <

-≤ - <

-≤⋅ - <

-≤-<

4

2

13

1 4

2

3

212

1

4

2

23

246

() ()

++++

≤≤

444

21 x 0