Algebra Demystified 2nd Ed

(Marvins-Underground-K-12) #1
Chapter 10 QuadratiC EQuations 381

9.^142133343


1

xxx^2

x
xx

x


+
+


+

= −
−−
Denominatorfactored:
−−

+
+


+

= −
−+
=− ++

4

2
1

3
3

3
41
413

xx

x
xx
xxx

()()
LCD( )( )( )
(xxxx
x

xxx
x

−++⋅

+− ++⋅
+

413 1
4

413 2
1

)( )( )()( )( )

(xxxx
x
xxx x

−++⋅
+
=− ++⋅

413 3
3
413

)( )( )

()()() −−
−+
+++−+− −

3
41
1324334

()()
()()[( )( )] [( )(

xx
xx xx xx++=+ −
+++−−−

133

(^22432123)
)] ()()
()(
xx
xx xx xxx x
xx xx x
22
22 2
34 9
432224 3
−−=−
+++−−− +
)
           99129
11 99
11 9119
011
0
2
2
2
xx
xx
xx
xx
xx
+=−
−= −
−+−+
=−


( −−
=−=
11
0110
)
xx
++


11 11
x 11


10.^4
1


3
1

1
2

6
1
3

xx xx^2

x


+
+

=−


Denominatorfactored:^4 +
1 xxxxx
xx x
xx x

+

=−
−+
=−+
−+

1

1
2

6
11
211
211

()()
()()
()(

LCD
))()( )

()()



+−+
+
=−+⋅

4
1

211 3
1
211 1

x

xx x
x
xx x
22

211 6
11
2142 13

x

xx x
xx
xx xx

−−+
−+
++−

()()
()()
()() ()())( )( )()
()

=− +−
++ −= −−
+

xx x
xx xx xx
x

1126
81 112
8

2
2

6( 1)
8866121
14 2121

22
22

xxxx x
xxxx

+−=− −
+=−−
−+xx^2212 +−++ 11 xx 21
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