(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

I need to show that (-x)*y=-(x*y) for a ring. unless it's not true.

2. Relevant equations

A ring is a set R and operations +, * such that (R, +) is an Abelian group, * is associative, and a*(b+c)=a*b+a*c and (b+c)*a=b*a+c*a.

3. The attempt at a solution

I don't know what the first step of this proof will be, I'm looking for the *trick*, as it were.

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# Homework Help: Prove (-x)y=-(xy) for rings

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