TÌM X A) X – 2X – 1X X2 12 B) X 2X 2 – X – 2X – 28...

Bài 11: Tìm x

a)

x

– 2



x

– 1

x x

2

1

2

b)

x

2



x

2 –

 

x

– 2



x

– 2

8

x

c)

2

x

1

 

x

2

x

1

2

x

3

– 3

x

2

2

d)

x

1

 

x

2

2

x

4 –

x

3

– 3

x

2

16

0

e)

x

1



x

2



x

5 –

x

3

– 8

x

2

27