Algebra Demystified 2nd Ed

360 alGEbra De mystif ieD

7. xx

xx

xx

xx

2

2

2

1

2

30

2 1

2

320

260

23

−−=

 −−







=

−−=

+

()

()( −−=

+= −=

−−

20

23020

33

)

xx

++

=− =

=−

22

23 2

3

2

xx

x

8. −++=

−− ++







=−

−−=

3

2

1

2

10

2 3

2

1

2

120

320

2

2

2

xx

xx

xx

()

(() 32 () 10

32010

xx

xx

+−=

+= −=

−− ++

=−

22 11

32 xx==

=−

=−

1

3

3

2

3

2

3

x

x

9. 618240
   1
   6

61824 1

6

0

340

4

2

2

2

xx

xx

xx

x

+−=

+−=

+−=

+

()()

()(xx

xx

−=

+= −=

10

40 10

)

−− ++

=− =

44 11

xx 41