X2 49 X 2 A. 1 X 1 X 1 X 1 X211Y 2Y 11Y B. X 7 C. 1...
Bài 1: (3đ)
2
9x
:
3x 6x
:
x
2
49 x 2
a.1 x 1 x 1 x
1 x
11y 2y 11y
b.x 7
c.1
1
2
2
4
4
2
9x
:
3x 6x
:
x
2
49 x 2
a.1 x 1 x 1 x
1 x
11y 2y 11y
b.x 7
c.1
1
2
2
4
4