BÀI 3. (2 ĐIỂM) TÌM X BIẾT A) 6X2 – 2 – 3 3( X )( X+2)=1B) (X+1 –) (...

1. = −xb) (x+1)

³

−(x−1)(x

²

+ + − =x 1) 2 0 + − − − =

3

3

(x 1) (x 1) 2 0 + + + − + − =

3

2

3

3 3 1 1 2 0x x x x + = 3 (x x 1) 0 =0x  = − 1