2ab/(a+b)(a-c)+2bc/(a+b)(c-a)

题目详情

2ab/(a+b)*(a-c)+2bc/(a+b)*(c-a)

▼优质解答

答案和解析

2ab/(a+b)*(a-c)+2bc/(a+b)*(c-a)
=2ab/(a+b)*(a-c)-2bc/(a+b)*(a-c)
=2ab-2bc/(a+b)*(a-c)
=2b(a-c)/(a+b)*(a-c)
=2b/a+b

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