lal-la+bl+lc-al+lb-cl 化简.c>a>0>blal-la+bl+lc-al+lb-cl 化简。c>a>0>b

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lal-la+bl+lc-al+lb-cl化简.c>a>0>blal-la+bl+lc-al+lb-cl化简。c>a>0>blal-la+bl+lc-al+lb-cl化简.c>a>0>blal-la+

lal-la+bl+lc-al+lb-cl 化简.c>a>0>blal-la+bl+lc-al+lb-cl 化简。c>a>0>b
lal-la+bl+lc-al+lb-cl 化简.c>a>0>b
lal-la+bl+lc-al+lb-cl 化简。c>a>0>b

lal-la+bl+lc-al+lb-cl 化简.c>a>0>blal-la+bl+lc-al+lb-cl 化简。c>a>0>b
2c-a

1 A绝对值大于B的 则 A-A-B+C-A+C-B=2C-A-2B
2 A绝对值小于B的 则 A+A-B+C-A+C-B=2C+A-2B