A) (X1)(X2 X 1) X X( 2)(X2) 5 3 2X X X1 4 5 3 3X X X 4 6X3 2B) X1 3 X 136X12 10 3 2 3 2 2X X X X X X X X3 3 1 3 3 1 6 2 1 10 3 3 1 3 3 1 6 12 6 10 12 6...
Bài 4: Tìm
x
,
biết:
a)
(
x
1)(
x
2
x
1)
x x
(
2)(
x
2) 5
3
2
x
x x
1
4
5
3
3
x
x
x
4
6
x
3
2
b)
x
1
3
x
1
3
6
x
1
2
10
3
2
3
2
2
x
x
x
x
x
x
x
x
3
3
1
3
3
1
6
2
1
10
3
3
1
3
3
1 6
12
6
10
12
6
1
c)
x
3
x
2
3
x
9
x x
2 2
x
1
3
3
3
2
2
2
1
3
27 4
3
1
4
x
28
7
x
d)
x
1
3
x
3
x
2
3
x
9
3
x
2
4
2
3
3
2
3
1
3
3
3
3
2
12 2
x
x
x
x
x
3
x
42
14
x
.