Algebra Demystified 2nd Ed

372 alGEbra De mystif ieD

or ()(0)

3

()^2 (

−− ++=−

−−=

=−− ±−−

13 411

410

444

2

2

xx

xx

x ()^33141612

6

428

6

447

6

427

6

2

)( )

2(3)

()

2

− = ±−−

= ± = ±⋅= ± = ( ±^7727

3

)

6

= ±

6. 910100
   114

xx^2 xx

x

−= −− =

=−− ±−−

(Equivalentto9 )

()

2

()^2 ((9)( )

2(9)

()

18

− = ±−−

= ± = ± = +

10 11360

1 361

18

119

18

1199

18

119

18

20

18

18

18

10

9

,,− = − =−, 1

7. 10 50
   554 0525

xx^2

x

−=

=−− ±−−(() )(10)()= ±−

2(10)

(^200)
20
= ±
= ± ==
525
20
55
20
10
20
0
20
1
2
,, 0

8. 01 01110
   10001 0111
   11

2

2

..

..

xx

xx

x

−−=

−−=

−

()100(0)

10 2 xx

x

−=

=−− ±− −−= ±

100 0

(( 11 11 )( 4 10)() 100 11 121

2(10)

)^2 −−−

= ±

(

400

11 4121

20

0)

20

9. 1
   3

1

6

1

8

0

24 1

3

1

6

1

8

43

2

2

xx

xx

xx

+−=

 +−







=

+−=

24(0)

8 2 00

4448 3

28

41696

16

4 112

16

2

x=−± −−=−± −− =−±

=

()()

()

()

−−± ⋅^4167 =−± = −± =−±

16

447

16

417

16

17

4

()