2( 1)( 1)X X 2( 1)( 1)2( 1)( 1)X X( 1)( 1).2 X X ...
3.2
( 1)( 1)
x x
2( 1)( 1)
( 1)( 1).2 x x +
=
+
=
2 2 1 6 2 3 3
2 2 1 6 ( 2 3 3)
x x x x x
x x x x x
=
=
5
10
2 1
2( 1)( 1) x x =
x
=
2 (1 )
(1 )
x
1
( 2 9)
9 2
3
+
=
-
-
b.
( 1)( 3)
2 9
( 3)( 3)
+
+
+
=
=
2 3 3 2 3 3 2 2 2
( 1)( 3) ( 1)( 3) 2 (1 )
x x x x x x
x x x x x x x x
=
2 6 2( 3) 2
2 6
( 3)( 3) ( 3)( 3) 3
=
1 3 1 1
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