A) 2X X  3 X X2  1 10 B) 23X92X143X2 X 23GIẢI A) TA CÓ

Bài 1: Tìm x, biết: a) 2x x

 3

 

x x2  1

10 b) 23x92x14

3x

2

 x 2

3Giải a) Ta có: 2x x

 3

 

x x2  1

10 2x

2

6x2x

2

 x 10   5x 10 x 2b) Ta có: 23x92x14

3x

2

 x 2

3    2 9 2 1x x x x x

2

         3 2 33 2 3 4x x x               

2

2

5 53 3 2 3 2 3 5 6x x x x6 6 6