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( C ( 3 * 8@ = .@.  1H//B %KLLM/ <N  II.TỰ LUẬN : ( 7 đ) 6N  K8O!8-L+-PQR)'S0>A>/T>/ >/ %U+@NVW-L+OX # Ax− ≤ < 6N##, * + * 8P ( 8C (  /H2#"2/G/#/H %/#  2 1 3− 2/ /#/ 6NVhợp lý# HG01T#1HG02#A /T# %#T#?/#?T2#?A 6N"YO#   G Tx+ = − % A/#O2HB " Bài làm :                      I8  6>#6>4>"5#>H/#ZH%   R<[T Bài 1) /T>/>/ >A>0  Bài 2) 2a) ( - 5 + 2 ) . 4 + ( - 8 -2) : (-5) = B/"2/ A/H A:H B/ #2# A:#H B/ A A:#H #% (-2) 3 + 1 3− + (-1).(-2).(-3)= B/G2 2− /? 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