A X X) (  2015) X2015 0 B X)  42 2X12 C)(3X2)(X2 9) (2 X...

Câu 2: Tìm x:

a x x) ( 2015) x2015 0

b x)

4

2

2x1

2

c)(3x2)(x

2

9) (2 x2018)(x

2

9)

2

2

)(

2

) 4 4 12 0d xxxx 

2 1 2x x 1 1