问题标题:
初二数学计算题,急求(a+b+c)分之(a-b+c)-(b-c+a)分之(a-2b+3c)+(c-a-b)分之(b-2c)
问题描述:
初二数学计算题,急求
(a+b+c)分之(a-b+c)-(b-c+a)分之(a-2b+3c)+(c-a-b)分之(b-2c)
陈志旺回答:
原式=(a-b+c)/(a+b+c)-(a-2b+3c)/[-(c-a-b)]+(b-2c)/(c-a-b)=(a-b+c)/(a+b+c)+(a-2b+3c)/(c-a-b)+(b-2c)/(c-a-b)=(a-b+c)/(a+b+c)+(a-2b+3c+b-2c)/(c-a-b)=(a-b+c)/(a+b+c)+(a-b+c)/(c-a-b)=(a-b+c)(c-a...
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