A) 3 ( X – 3) – 6X = 6 B) X2 + 9X – 10 = 0 2 10 25X X A X 5

Bài 2 (1 đ): Tìm x biết :

a) 3 ( x – 3) – 6x = 6 b) x

+ 9x – 10 = 0

10 25

x x

 

A x

 

5