Algebra Demystified 2nd Ed

Chapter 10 QuadratiC EQuations 379

4524 24

3624 24

22

2

xxxxx

xxx

+− +=−

+=−

−−+−+

−+=

−+=

24 24 24 24

318240

1

3

31824 1

3

2

2

xx

xx

xx

()(()

()()

0

680

420

40 20

xx^2

xx

xx

−+=

−−=

−= −=

++ ++

=

44 22

xx 4 x= 2

6.^2
1

32 2

1

32

2

x

xxxx

x

+ xxxx

+=

++

Denominatorfactored: +=

( ++

=+

+⋅

+

++⋅= +⋅

1

1

1 2

1

1 3 1 2

)

LCD()

() () ()

(

xx

xx x

x

xx

x

xx

xxx

xx

xx

+

++=

++=

1

2312

2332

2

2

)

()

−−

++=

22

23 xx^2100

2110

21010

()()

xx

xx

++=

+= +=

−− 11              

 But =1leadstoazero

−−

=− =− −

11

21 xx 1 x

inadenominator,so

x= xn=1is ota

−

−

1

2 ssolution.