X  X X 3( 1) 1 1A) 7 5 4 C) 5 62 6 B) (5X  1) (2X  5 ) = (5X  1) (X + 2) D) (X – 2 ) = 7 (10 – 4X ) G)3162X H) 5   X X     X X X2 X 1249

Bài 1: Giải phương trình :

x

  

x x

 

3( 1) 1 1

a) 7 5 4

 c) 5 6

2 6

 

b) (5x  1) (2x  5 ) = (5x  1) (x + 2) d) (x – 2 ) = 7 (10 – 4x ) g)

3

1

6

2

x h)

5

  x x

 

 

 

  x x x

2

x

12

4

9