A/ ( 2 + 2X )2 - ( 4X 2 - 1 ) =0B/ ( 3 – 2X ) ( 7 – X ) – 5 = X2

bài 2 : - KIEM TRA DAI SO 8 CHUONG
KIEM TRA DAI SO 8 CHUONG

Bài 2 : Tìm x biết :

a/ ( 2 + 2x )

2

- ( 4x

2

- 1 ) =0

b/ ( 3 – 2x ) ( 7 – x ) – 5 = x

2