... điểm tối đa) (1 ,0 đ) (0 ,25đ) •• ( •• 0• 9 10 (0 ,25đ) (0 ,5đ) (0 ,25đ) (0 ,25đ) (0 ,5đ) (0 ,5đ) (0 ,5đ) (0 ,75đ) (0 ,75đ) (0 ,5đ) A B C D 12 (cm) 27 (cm) s 3 : I.Lý thuyt(2) Hc sinh chn mt trong hai cõu ... 3(x – 1 )(2 x – 1) = 5(x + 8) (x – 1); b) 9x 2 – 1 = (3 x + 1 )(4 x +1) c) (x + 7 )(3 x – 1) = 49 – x 2 ; d) (2 x +1) 2 = (x – 1 ) 2 . e) (x 3 - 5x 2 + 6x = 0; g) 2x 3 + 3x 2 – 32x = 48 h) (x 2 – 5 )(x ... trên trục số. Bài 7a) (x – 1)(x + 2) > (x – 1) 2 + 3 ; b) x(2x – 1) – 8 < 5 – 2x (1 – x ); c )(2 x + 1) 2 + (1 - x )3x ≤ (x+2) 2 ; d) (x – 4)(x + 4) ≥ (x + 3) 2 + 5 e) 1 (2 5) 9 x x + −...