... – 2) – 5x(1 – x) – 8( x2 – 3) Bài 5: T n g tr ut ( ng p ýn u : 1/ 1,62 + 4.0 ,8. 3,4 +3,42 2/ 34.54 – (152+ 1)(152 – 1) 3/ 20042 -16; 4/ 89 22 + 89 2 216 + 1 082 5/10,2 9 ,8 – 9 ,8 0,2 + 10,22 –10,2 ... = 2/ x2 - 8x +16 = 3/ (x+5)(x-5) = 4/ x3 + 12x + 48x +64 = 5/ x3- 6x +12x - = 6/ (x+2)(x2-2x +4) = 7/ (x-3)(x2+3x+9) = 8/ x2 + 2x + = 9/ x2 – = 10/ x2 – 4x + = 11/ 4x2 – = 12/ 16x2 – 8x + = 3: ... hình thang vuông 2C ng m n Gọ N C 2SBCDP = SAPBC trung ng m n m CQ g o m T u gọn ut s u: T n n n g tr Bài 2: (2 = (4 – 3) – ( x + 1)2 –(11x2 – 12) ut : = (154 – 1).(154 + 1) – 38 58 m Tm t :...