QUY ĐỒNG CÁC PHÂN THỨC SAU

Bài 10.

Quy đồng các phân thức sau:

 

2

2

2

b / MTC : (2a 1) .(4a

2a 1)

a / MTC : 2.(a 1).(a

a 1)

 

a

a

a.(4a

2a 1)

1

1

a

a 1

 

2

2

2

2

2a 2

2.(a 1)

2.(a 1).(a

a 1)

4a

4a 1 (2a 1)

(2a 1) .(4a

2a 1)

1 2a

1 2a

(1 2a).(1 2a)

a 1

2.(a 1).(a 1)

 

 

3

2

2

2

8a

1 (2a 1).(4a

2a 1)

(2a 1) .(4a

2a 1)

a

a 1 2.(a 1).(a

a 1)

3

3

a

2a

2.(a

2a)

4a

4a 1

(2a 1)

(2a 1) .(1 2a)

2a 1)

 

3

2

a

1

2.(a 1).(a

a 1)

4a

2a 1 4a

2a 1 (2a 1) .(4a