Si (a-b-c)2= a2 + b2 + c2. Hallar M= bc/a(b+c) +ac/b(c-a) + ab/c(b-a)
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The hint is given in question
= ab+bc+ca=0 then ab+bc=-ca
And we can make other equation like this for make easy this question so now
we come back on question
-1-a+c/c-a-b+a/b-a
When try to solve this easy step you will find the Answer 1
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