Question

Q 15. Prove that

+

−

+−

= .



​

Answer 1

Step-by-step explanation:

I didn't understand your question sorry

Answer 2

Answer:

have two prepositions to prove with the basic axioms for addition and multiplication:

For all m∈Zm∈Z, −(−m)=m−(−m)=m

(−m)+−(−m)(−m)+m(−m)+−(−m)m+(−m)+−(−m)0+−(−m)−(−m)=0=0=(−m)+m=m+(−m)+m=0+m=m(−m)+−(−m)=0(−m)+m=0(−m)+−(−m)=(−m)+mm+(−m)+−(−m)=m+(−m)+m0+−(−m)=0+m−(−m)=m

−0=0−0=0

(−0)+−(−0)(−0)+0(−0)=0=0=0(−0)+−(−0)=0(−0)+0=0(−0)=0

The second step is based on the first preposition.

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